32 | Rectangle area function

What it is is:

rectangle.py

# The area function accepts a rectangle's width and
# length as arguments and returns the rectangle's area.
def area(width, length):
    return width * length

# The perimeter function accepts a rectangle's width
# and length as arguments and returns the rectangle's
# perimeter.
def perimeter(width, length):
    return 2 * (width + length)

# The main function is used to test the other functions.
def main():
    width = float(input("Enter the rectangle's width: "))
    length = float(input("Enter the rectangle's length: "))
    print('The area is', area(width, length))
    print('The perimeter is', perimeter(width, length))

# Call the main function ONLY if the file is being run as
# a standalone program.
if __name__ == '__main__':
    main()