Programming terms & practical skills

Build a foundation for reading, planning and checking code.

Start with a term you recognize. Each page explains the idea, introduces three related skills and shows an example you can check.

Choose a term

Algorithm
Skills: break down tasks, define inputs, check outcomes.
Variable
Skills: name meaningfully, track values, understand scope.
Data type
Skills: identify values, convert deliberately, handle absence.
Condition
Skills: write clear rules, check boundaries, cover alternatives.
Loop
Skills: choose the sequence, track progress, plan the end.
Function
Skills: define responsibility, specify inputs, check results.
Array
Skills: read positions, process collections, preserve meaning.
Object
Skills: model information, access consistently, validate structure.
Debugging
Skills: reproduce clearly, narrow the cause, verify the correction.
Version control
Skills: make focused changes, compare differences, record context.