Techniques to Maintain Programs (Edexcel GCSE Computer Science)

def calculate_area_of_triangle(base, height):

# -----------------------------------------------------------------------

"""

Calculates the area of a triangle given its base and height.

Inputs:

base (float): The length of the triangle's base (positive value).

height (float): The height of the triangle from the base (positive value).

Returns:

The calculated area of the triangle (float).

Raises:

ValueError: If either base or height is non-positive.

"""

# -----------------------------------------------------------------------

if base <= 0 or height <= 0:

raise ValueError("Base and height must be positive values.")

area = 0.5 base height

return area

def main():

# -----------------------------------------------------------------------

# Prompts the user for triangle base and height, calculates and prints the area

# -----------------------------------------------------------------------

try:

base = float(input("Enter the base of the triangle: "))

height = float(input("Enter the height of the triangle: "))

# Call the area calculation function

area = calculate_area_of_triangle(base, height)

print(f"The area of the triangle is approximately {area:.2f} square units.")

except ValueError as error:

print(f"Error: {error}")

# ------------------------------------------------------------------------

# Main program

# ------------------------------------------------------------------------

main()