Here we will build a simple calculator using python.The operations in calculator will be:

  • addition of 2 numbers
  • subtraction of 2 numbers
  • multiplication of 2 numbers
  • division of 2 numbers
  • Remainder of 2 numbers

Below is the code:


print(“select operation”)


print(“1.Add”)
print(“2.subtract”)
print(“3.multiply”)
print(“4.Division”)
print(“5.Reminder”)
def add(x,y):
    return x+y
def subtract(x,y):
    return x-y
def multiply(x,y):
    return x*y
def divide(x,y):
    return x/y
def remainder(x,y):
    return x%y
choice = input(“input ur choice(1/2/3/4/5):”)
num1=int(input(‘enter 1st no:’))
num2=int(input(‘enter 2nd no:’))
if choice == ‘1’ :
    print(num1,”+”,num2,”=”,add(num1,num2))
elif choice == ‘2’ :
    print(num1,”-“,num2,”=”,subtract(num1,num2))
elif choice == ‘3’  :
    print(num1, “-“, num2, “=”, multiply(num1, num2))
elif choice == ‘4’:
    print(num1, “-“, num2, “=”, divide(num1, num2))
elif choice == ‘5’:
    print(num1, “%”, num2, “=”, remainder(num1, num2))
else:
    print(“Invalid input entered”)


Output:
select operation
1.Add
2.subtract
3.multiply
4.Division
5.Reminder
input ur choice(1/2/3/4/5):5
enter 1st no:80
enter 2nd no:20

80 % 20 = 0
—————-select operation
1.Add
2.subtract
3.multiply
4.Division
5.Reminder
input ur choice(1/2/3/4/5):1
enter 1st no:80
enter 2nd no:20

80 + 20 = 100

You can see the output of calculator operations in IDLE as below