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GCSE Computer Science · key term
An expression that evaluates to true or false and can control a decision or a loop.
Used by OCR
Paper 2
Revise: Trace TablesA step, line number or condition column can help you keep track of execution.
An expression that evaluates to True or False and can control a branch or loop.
Use the latest value of each variable when evaluating an expression or condition.
Check the loop condition again after each iteration, including the final check that ends the loop.
For a while loop, identify the starting value, continuation condition and update. Check that the update can eventually make the condition false.
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An expression evaluated as True or False, which a program can use to make a decision.
A test that evaluates to true or false, used in a WHERE clause to decide which records to return.