Calculator.py

# Write a program that performs the tasks of a simple calculator. 
# The program should first take an integer as input and 
# then based on that integer perform the task as given below.
# 1. If the input is 1, then 2 integers are taken from the user and
# their sum is printed.
# 2. If the input is 2, then 2 integers are taken from the user and
# their difference(1st number - 2nd number) is printed.
# 3. If the input is 3, then 2 integers are taken from the user and
#  their product is printed.
# 4. If the input is 4, then 2 integers are taken from the user and
#  the quotient obtained (on dividing 1st number by 2nd number) is printed.
# 5. If the input is 5, then 2 integers are taken from the user and
#  their remainder(1st number mod 2nd number) is printed.
# 6. If the input is 6, then the program exits.
# 7. For any other input, then print "Invalid Operation".

while True:
    i = int(input())
    if(i == 1):
        a = int(input())
        b = int(input())
        print(a+b)
    elif(i == 2):
        a = int(input())
        b = int(input())
        print(a-b)
    elif(i == 3):
        a = int(input())
        b = int(input())
        print(a*b)
    elif(i == 4):
        a = int(input())
        b = int(input())
        print(a//b)
    elif(i == 5):
        a = int(input())
        b = int(input())
        print(a % b)
    elif(i == 6):
        break
    else:
        print("Invalid Operation")