# def functionName(arg1,arg2....argN):
      #function definition

#function call by using function name

def addNumbers(num1,num2):
    res=num1+num2
    print(res)

addNumbers(10,20)
addNumbers(100,200)


def sub(num1,num2):
    res=num1-num2
    print(res)
sub(200,100)