CodeHS 6.8

# This program will calculate the area of a square with side length given by
# the user. If a value less than or equal to 0 is given, the default value
# of 10 will be used.


# This function calculates the area of a square and prints the output
def calculate_area(side_length = 10):
    area = side_length * side_length
    print("The area of a square with sides of length " + str(side_length) + " is " + str(area))

# Takes the value for side length from user
length = int(input("Enter side length: "))

# If the length is greater than 0, uses the value given by user.
# Otherwise, uses the default value by not inputting an argument.
if length > 0:
    calculate_area(length)
else:
    calculate_area()