#Returns the sum of num1 and num2
def add(num1, num2):
	return num1 + num2


def main():
	operation = input("What do you want to do (+,-,*,/):")
	if(operation != "+" and operation != "-" and operation != "*" and operation != "/"):
		#invalid operation
		print("You must enter a valid operation")
	else:
		var1 = int(input("Enter num1: "))
		var2 = int(input("Enter num2: "))
		if(operation == "+"):
			print(add(var1, var2))
		elif(operation == "/"):
			print(div(var1, var2))
		elif(operation == "-"):
			print(sub(var1, var2))
		else:
			print(mul(var1, var2))

main()