functions.py

def factorial(n) -> object:
    return 1 if (n==1 or n==0) else n * factorial(n-1)
n= int(input("enter number"))
print(factorial(n))


def greatest(x,y,z):
    if (x>y)and(x>z):
        print(x,"is greatest")
    elif (y>x)and (y>z):
        print(y,"is greatest")
    else:
        print(z,"is greatest")
        

def addtwo(x,y):
    return x+y

def subtracttwo(x,y):
    return x-y

def multiplytwo(x,y):
    return x*y

def dividetwo(x,y):
    return x/y

def square(x):
    return (x*x)