#def fun_name(arg1,arg2,   ,arg n):
 #function definition
 #return stmt


def add(n1,n2):
    res=n1+n2
    return res

x=add(1,2)
print(x)



def sub(n1,n2):
    res = n1 - n2
    print(res)
sub(3,1)


def mul(n1,n2):
    res = n1 * n2
    print(res)
sub(3,1)


def div(n1,n2):
    res = n1 / n2
    print(res)
sub(3,1)


