Python_For_answers

 -->If we want to execute some action for every element present in some sequence(It may be string or collection) then we should go for 'for loop'.


Syn:
      for variable in sequence:
         body
         ------
         -------

Ex:Write a program To print Hello 10-times

for i in range(10):
   print('Hello')
________________________________________________________________________

#Ex: write a program to display the first 10 numbers

for i in range(10):
   print(i)

________________________________________________________________________

#Ex: write a program to display the numbers from 5 to 20 using the start parameter 5 in range():
for x in range(5, 20):
    print(x)

________________________________________________________________________

# Ex: write a program to display the numbers from 5 to 20 using the start parameter 1, increment the sequence with 5:
for i in range(1,100,5):
    print(i)

________________________________________________________________________


#Ex: write a program to display numbers from 10 to  1 reverse order.

for i in range(10,0,-1):
   print(i)

________________________________________________________________________
#Ex: write a program to display the first 10 numbers,  add the $ end of line

number_list = [ 1,2,3,4,5]
for i in number_list:
    print(i, end='$')
    print()

________________________________________________________________________

# Print all numbers from 0 to 5, and print a message when the loop has ended:

for x in range(6):
    print(x)
else:
    print("For Loop finally finished!")

________________________________________________________________________

#Ex: write a program to  display Even numbers from 0-20

for i in range(21):
    if ( i%2 == 0):
        print(i, "is Even number")
or
for i in range(1,21,2):
   print(i)

________________________________________________________________________

#Ex: write a program to  display odd numbers from 0-20
# Odd numbers
for i in range(21):
    if ( i%2 == 1):
        print(i, "is Odd number")
________________________________________________________________________


#Ex: write a program to  display both even and odd numbers from 0-20

for i in range(21):
    if ( i%2 == 0):
        print(i, "is Even number")
    else:
        print(i, "is Odd number")

________________________________________________________________________

# write a program to find the leap years between 2000 and 2100 years using the range()

number_str = input ("Enter the number: ")
given_number = int(number_str)

for i in range(2000, 2100):
    if( i %4 ==0):
       print("Leap Year")
________________________________________________________________________

#Ex: write a program to display the numbers divisible by 3, 5 and both 3 and 5 using if condition in loop

for n in range(1, 101):
    if n % 3 == 0 and n % 5 == 0:
        print("Three and 5 are friends")
    elif n % 3 == 0:
        print("Three alone")
    else:
        print("5 alone")

________________________________________________________________________

#Ex: write a program to read the number from user and display the first 'N' numbers

number_str = input ("Enter the number: ")
number = int(number_str)

# since for loop starts with  the zero indexes we need to skip it and start the loop from the first index.

for i in range(1,number):
        print(i)
________________________________________________________________________

#Ex: write a program to  display number pyramid like
5
55
555
5555

num = input("Enter the number")
for i in range (11):
    val = num * i
    print("%s X %s = %s" %(num, i, val))

________________________________________________________________________


#Ex:  Python program to add 50 for each number in the list

# Write the flow chart using counter loop

number_str = input ("Enter the number: ")
given_number = int(number_str)

for i in range(11):
        print (given_number," + ", i , " =" ,50 + i)

________________________________________________________________________

#Ex:  Python program to print a multiplication table of a given number

# Write the flow chart using counter loop

number_str = input ("Enter the number: ")
given_number = int(number_str)

# Multiplication Table generally have 10 entries so taking range 11

for i in range(11):
        val = num * i
        print("%d X %d = %d" %(num, i, val))
        print (given_number," x ", i , " =" ,5*i)
        print (f' {given_number} X {i} = {given_number*i}')

________________________________________________________________________

# write a program to write the 2 multiplication table using the range()

# write a program to write the 5 multiplication table using the range()

# write a program to write the 2, 3 and 4 multiplication tables at a time range() and nested for loops



#Ex: write a program to sum of all numbers from 1 to a given number

# if the given number is 10
number_str = input ("Enter the number: ")
given_number = int(number_str)

# set up a variable to store the sum with initial value of 0
sum = 0

# since we want to include the number 10 in the sum increment given number by 1 in the for loop
for i in range(1,given_number+1):
        sum+=i

# print the total sum at the end
print(sum)

---------------------------------------------------------------------------

Example 4: Python program to calculate the sum of all the odd numbers within the given range.

# if the given range is 10
number_str = input ("Enter the range: ")
given_range = int(number_str)

# set up a variable to store the sum
# with initial value of 0
sum = 0

for i in range(given_range):

        # if i is odd, add it
        # to the sum variable
        if i%2!=0:
                sum+=i

# print the total sum at the end
print(sum)
---------------------------------------------------------------------------

Example 4: Python program to calculate the sum of all the even numbers within the given range.
---------------------------------------------------------------------------

# if the given range is 10
number_str = input ("Enter the range: ")
given_range = int(number_str)

# set up a variable to store the sum
# with initial value of 0
sum = 0

for i in range(given_range):

        # if i is odd, add it
        # to the sum variable
        if i%2==0:
                sum+=i

# print the total sum at the end
print(sum)
---------------------------------------------------------------------------

Example 7: Python program to count the total number of digits in a number.

# if the given number is 129475
given_number = 129475

# since we cannot iterate over an integer in python, we need to convert the integer into string first using the str() function
given_number = str(given_number)

# declare a variable to store the count of digits in the given number with value 0

count=0

for i in given_number:
        count += 1

# print the total count at the end
print(count)


---------------------------------------------------------------------------

Example 8: Python program to check if the given string is a palindrome.

# given string
given_string = "madam"

# an empty string variable to store the given string in reverse
reverse_string = ""

# iterate through the given string and append each element of the given string to the reverse_string variable

for i in given_string:
    reverse_string = i + reverse_string

# if given_string matches the reverse_srting exactly the given string is a palindrome else the given string is not a palindrome

if(given_string == reverse_string):
   print("The string", given_string,"is a Palindrome.")
else:
   print("The string",given_string,"is NOT a Palindrome.")

---------------------------------------------------------------------------

Example 9: Python program that accepts a word from the user and reverses it.

# input string from user
given_string = input()

# an empty string variable to store
# the given string in reverse
reverse_string = ""

# iterate through the given string
# and append each element of the given string
# to the reverse_string variable
for i in given_string:
    reverse_string = i + reverse_string

# print the reverse_string variable
print(reverse_string)

---------------------------------------------------------------------------

Example 10: Python program to check if a given number is an Armstrong number
# the given number
given_number = 153

# convert given number to string so that we can iterate through it

given_number = str(given_number)

# store the length of the string for future use
string_length = len(given_number)

# initialize a sum variable with 0 value to store the sum of the product of each digit
sum = 0

# iterate through the given string
for i in given_number:
    sum += int(i)**string_length

# if the sum matches the given string its an Armstrong number

if sum == int(given_number):
    print("The given number",given_number,"is an Armstrong number.")
else:
    print("The given number",given_number,"is Not an Armstrong number.")

---------------------------------------------------------------------------
Example 6: Python program to display numbers from a list using a for loop.
# if the below list is given
list = [1,2,4,6,88,125]
 for i in list:
    print(i)

---------------------------------------------------------------------------

Example 11: Python program to count the number of even and odd numbers from a series of numbers.

# given list of numbers
num_list = [1,3,5,6,99,134,55]


# iterate through the list elements
# using for loop
for i in num_list:

    # if divided by 2, all even number leave a remainder of 0
    if i%2==0:
        print(i,"is an even number.")

    # if remainder is not zero then it's an odd number
    else:
        print(i,"is an odd number.")

---------------------------------------------------------------------------

Example 12: Python program to display all numbers within a range except the prime numbers.

# Prime numbers
print(f"Prime number \t\t\t Not a prime")
for n in range(2, 101):
    for x in range(2, int(n/2)):
        if n % x == 0:
            print(f"\t\t\t {n} equals {x} X {n / x} hence its not a prime")
            break
    else:
        print(f"{n} is a prime number")




# import the math library
import math

# function to print all
# non-primes in a range
def is_not_prime(n):

    # flag to track
    # if no. is prime or not
    # initially assume all numbers are
    # non prime
    flag = False

    # iterate in the given range
    # using for loop starting from 2
    # as 0 & 1 are neither prime
    # nor composite
    for i in range(2, int(math.sqrt(n)) + 1):

        # condition to check if a
        # number is prime or not
        if n % i == 0:
            flag = True
    return flag

# lower bound of the range
range_starts = 10

# upper bound of the range
range_ends = 30
print("Non-prime numbers between",range_starts,"and", range_ends,"are:")

for number in filter(is_not_prime, range(range_starts, range_ends)):
    print(number)

---------------------------------------------------------------------------

Example 13: Python program to get the Fibonacci series between 0 and 50.

# given upper bound
num = 50

# initial values in the series
first_value,second_value = 0, 1

# iterate in the given range
# of numbers
for n in range(0, num):

    # if no. is less than 1
    # move to next number
    if(n <= 1):
        next = n

    # if number is within range
    # execute the below code block
    if nextnum:
        break
    # print each element that
    # satisfies all the above conditions
    print(next)

---------------------------------------------------------------------------

Example 14: Python program to find the factorial of a given number.

# given number
given_number= 5

 # since 1 is a factor
 # of all number
 # set the factorial to 1
factorial = 1

# iterate till the given number
for i in range(1, given_number + 1):
    factorial = factorial * i

print("The factorial of ", given_number, " is ", factorial)
---------------------------------------------------------------------------


Example 15: Python program that accepts a string and calculates the number of digits and letters.

# take string input from user
user_input = input()

# declare 2 variable to store
# letters and digits
digits = 0
letters = 0

# iterate through the input string
for i in user_input:

    # check if the character
    # is a digit using
    # the isdigit() method
    if i.isdigit():

        # if true, increment the value
        # of digits variable by 1
        digits=digits+1

    # check if the character
    # is an alphabet using
    # the isalpha() method
    elif i.isalpha():

        # if true, increment the value
        # of letters variable by 1
        letters=letters+1

print(" The input string",user_input, "has", letters, "letters and", digits,"digits.")

---------------------------------------------------------------------------

Example 16: Write a Python program that iterates the integers from 1 to 25.

# given range
given_range = 25

# iterate using a for loop till the
# given range
for i in range(given_range+1):

    # if no. is multiple of 4 and 5
    # print fizzbuzz
    if i % 4 == 0 and i % 5 == 0:
        print("fizzbuzz")

        # continue with the loop
        continue

    # if no. is divisible by 4
    # print fizz and no by 5
    if i % 4 == 0 and i%5!=0:
        print("fizz")

        # continue with the loop
        continue
    # if no. is divisible by 5
    # print buzz and not by 4
    if i % 5 == 0 and i % 4!= 0:
        print("buzz")

    else:

        # else just print the no.
        print(i)

---------------------------------------------------------------------------
Example 17: Python program to check the validity of password input by users.

# input password from user
password = input()

# set up flags for each criteria
# of a valid password
has_valid_length = False
has_lower_case = False
has_upper_case = False
has_digits = False
has_special_characters = False


# first verify if the length of password is
# higher or equal to 8 and lower or equal to 16
if (len(password) >= 8) and (len(password)<=16):

    has_valid_length = True

    # iterate through each characters
    # of the password
    for i in password:

        # check if there are lowercase alphabets
        if (i.islower()):
                has_lower_case = True

        # check if there are uppercase alphabets
        if (i.isupper()):
                has_upper_case = True

        # check if the password has digits
        if (i.isdigit()):
                has_digits = True

        # check if the password has special characters
        if(i=="@" or i=="$" or i=="_"or i=="#" or i=="^" or i=="&" or i=="*"):
                has_special_characters = True


if (has_valid_length==True and has_lower_case ==True and has_upper_case == True and has_digits == True and has_special_characters == True):
    print("Valid Password")
else:
        print("Invalid Password")

---------------------------------------------------------------------------

Example 18: Python program to convert the month name to a number of days.


# given list of month name
month = ["January", "April", "August","June","Dovember"]

# iterate through each mont in the list
for i in month:
    if i == "February":
            print("The month of February has 28/29 days")
    elif i in ("April", "June", "September", "November"):
            print("The month of",i,"has 30 days.")
    elif i in ("January", "March", "May", "July", "August", "October", "December"):
            print("The month of",i,"has 31 days.")
    else:
            print(i,"is not a valid month name.")
---------------------------------------------------------------------------

Ex:To print characters present in the given string
---------------------------------------------------------------------------
s = 'sunny'
for x in s:
   print(x)

Ex:To print characters present in string index wise
----------------------------------------------------------------------------
s = 'lilly'
i = 0
for x in s:
   print('The  character present at',i,'index:',x)
   i += 1

_______________________________________________________________________________________

# Loop through the string characters, eg - "banana":
for x in "banana":
    print(x)

# Loop through the string list : # Print each fruit in a fruit list:
fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
    print(fruit)

# Loop through the number list : # Print each fruit in a fruit list:
number_list = [68, 78, 88 , 8, 18, 28, 38, 48, 58 ]
for number in number_list:
    print(number)



# Loop through the tuple
tuple1  = (4,5,3,6,7,8,1,2,6)
tuple1
for i in tuple1:
    print(i)
________________________________________________________________________
# Loop through the set
set1  = {44,5,3,6,7,8,1,2,6,44,44}
print(set1)  # it displays unique items in unordered

for i in set1:
    print(i)
________________________________________________________________________
# Loop through the dictionary
d = dict()
d['duration'] = 120
d['fee'] = 25000
d['rating'] = 4
________________________________________________________________________
for i in d:
    print("%s %d" % (i, d[i]))
________________________________________________________________________
d = dict()
d['name'] = 'Test_Name'
d['course'] = 'AI'
d['Loc'] = 'Hyd'
for i in d:
    print("%s %s" % (i, d[i]))

#________________________________________________________________________________________



# loop breaks , break loop if you encounter value 5
numlist = [ 1,2,3,4,5,6,7,8,9]
for i in numlist:
    if i == 5 :
        break
    print(i)

# output is -  1
# 2
# 3
# 4

#Break Vs Continue the loop

for i in numlist:
    if (i == 5):
        continue
    print(i)

#output is -
# 1
# 2
# 3
# 4
# 6
# 7
# 8
# 9

# Exit the loop when x is "banana":
fruits = ["apple", "banana", "cherry"]
for x in fruits:
    print(x)
    if x == "banana":
        break

# With the continue statement we can stop the current iteration of the loop, and continue with the next:
# Do not print banana:

fruits = ["apple", "banana", "cherry"]
for x in fruits:
    if x == "banana":
        continue
    print(x)


for i in "Python":
    if( i == 't'):
        break
    print(i)

for i in "Python":
    if( i == 't'):
        continue
    print(i)

# Break the loop when x is 3, and see what happens with the else block:
for x in range(6):
    if x == 3: break
    print(x)
else:
    print("Finally finished!")


# for loops cannot be empty, but if you for some reason have a for loop with no content, put in the pass statement to avoid getting an error.

for x in [0, 1, 2]:
    pass

#Interview question - How to execute the for loop without body? use the pass statement.
str1 = "banana"
for x in str1:
    pass


## Nested Loops
# Print each adjective for every fruit:

adj = ["red", "big", "tasty"]
fruits = ["apple", "banana", "cherry"]

for x in adj:
    for y in fruits:
        print(x, y)

# Nested with lists
nested_list=[[1,2,3],['a','b','c'],[1.1,2.2,3.3]]
for i in nested_list:
    print(i)
    for j in i:
        print(j)

# Nested with dictionaries
d = {'name': ['a','b','c'], 'Age': [10,20,30], 'Sal':[1,2,3]}
for i in d.values():
    print (i)
    for j in i:
        print(j)



##########################################################################

cars = ["ok", "ok", "faulty", "ok", "faulty", "ok"]
for status in cars:
    if status == "faulty":
        print("Stopping the production Line")
        break
    elif status == "ok":
        print(f"The car is {status}")
        print("Shipping new car")

cars = ["ok", "ok", "ok", "faulty", "ok"]
for status in cars:
    if status == "faulty":
        print("Stopping the production Line")
        break
    elif status == "ok":
        print(f"The car is {status}")
        print("Shipping new car")
else:
    print("All cars built successfully")


cars = ["ok", "ok", "faulty", "ok", "faulty", "ok"]
all_succesful = True

for status in cars:
    if status == "faulty":
        print("Stopping the production Line")
        all_succesful = False
        break
    elif status == "ok":
        print(f"The car is {status}")
        print("Shipping new car")

if all_succesful:
    print("All cars built successfully")


____________________________________________________________________________________________

Quiz:

Ex:
-----
a = [0,1,2,3]
for a[-1] in a:
   print(a[-1])#0 1 2 2

Q.
list = [1,0,2,0,3,0]
for i in list:
   if i == 0:
      list.remove(i)
      list.append(i)
print(list)#[1,2,3,0,0,0]

Q.
a = [1,2,3,4,5]
for i in a:
   a.remove(i)
print(a)#[2,4]

Q.
a,b = '06'
b,c = '26'
print(a+b+c)#026

Q.
s = 'python'
for i in range(len(s)):
   print(s)
   s = 'a'

Q.
name = 'Python'
if name == 'java' or 'html' or 'css':
   print('login successful')
else:
   print('Not valid')

Q.
a=['a','b','c','d']
for i in a:
    a.append(i.upper())
print(a)

What is the result?

A) ['a','b','c','d']
B) ['A','B','C','D']
C) SyntaxError
D) MemoryError thrown at runtime



67804202

____________________________________________________________________________________________

1) Apply the leaves before March


2) Performance goals and career development goals - April 
   mentors from different LOB [ go/imentor ; speak to avinash for mentor]
   speak to senior vps
   Portfolio
      horizontal [ across the passion ]
      Vertical [ AI; curiosity ]
      
      Devlopment plan
         certifications

3) Performance goals
   Accomplishments

____________________________________________________________________________________________

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