teaching.codes

Control Flow: The for Loops

Factorial Function

An alternative form of range() function can be used to specify the numbers to be included in the return list as in:

def calculate_factorial(number):

    factorial = 1

    for i in range(1, number+1):
        factorial = factorial * i

    return factorial


x = int(input("Enter a number for x: "))
y = int(input("Enter a number for y: "))

xFactorial = calculate_factorial(x)
yFactorial = calculate_factorial(y)

print(x, "! =", xFactorial)
print(y, "! =", yFactorial)

print("x! * y! =", xFactorial * yFactorial)
print("(x+y)! =", calculate_factorial(x+y))

where the values in the range [1,number] (number included) will be assigned to the variable iin each iteration of the for i in range(1, number+1): loop.