The program is an illustration of the square function.
The square function takes a number, and returns the square of the number; i.e. the product of the number twice.
So, the square function in Python, where comments are used to explain each line is as follows:
#This defines the square function
def square(num):
#This returns the square of the argument
return num**2
#This gets input for the number
num = int(input("Number: "))
#This calculates the square of the number
x = square(num)
#This prints the square
print("Square:",x)
Read more about Python functions at:
https://brainly.com/question/25120954
