calculator.py

#simple calculator

#define functions

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

#take input from the user
print("Select Operation:")
print("1.Add")
print("2.Subtract")
print("3.Multiply")
print("4.Divide")

choice = int(input("enter choice(1/2/3/4):"))

num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))

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))
else:
	print("Invalid input")