The function in Python where comments are used to explain each line is as follows:
#This defines the parts() function
def parts(length, width, height, radius):
    #This calculates the volume of the box
    VBox = length * width * height
    #This calculates the volume of the hole
    VHole = 3.142 * radius ** 2 * height
    #This calculates the remaining volume
    Volume =  VBox - VHole
    #This returns the volume of the remaining material
    return Volume
The above program is a sequential program, and it does not require loops, iterations and conditions.
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