Features of a good program

A good computer program should have these features:

• Correctness: gives the right output for every valid input.
• Readability: meaningful variable names, proper indentation and comments make it easy to understand.
• Efficiency: uses minimum time and memory.
• Simplicity and modularity: divided into small functions, each doing one job, so it is easy to test and reuse.
• Robustness: handles invalid input and unexpected cases without crashing (for example, division by zero).
• Portability: works on different machines and operating systems with little change.
• Maintainability and documentation: easy to modify, extend and debug later.
• User-friendly: clear prompts and understandable output messages.