Prompting User

Program prompts and validates the user input
Draw Half-Pyramid

Program now draws half-pyramid of height specified by user
Added Comments

Added comments to make it more clear what each part of the code does
Spelling Mistakes

Fixed spelling mistakes in comments
Prompt User for Change Required

Prompt the user how much change is required and validate input
Convert change to cents

Convert the specified amount to cents and round, explicitly convert
float to int.
Minimum amount of change

Determine the minimum amount of change to be given
Added Comments

Added comments to make it clear what each part of the code does