Read the revision notes one at a time, with a quick check after each one. Get one wrong and you can look back at the note and try again, then there's a final round of the ones you missed.
Condition-Controlled Loops: WHILE and REPEAT UNTIL
Comparison Operators and Conditions
Combining Conditions
Loop Control and Termination
FOR Loops
Validation Loops
Sentinel Values
Flags in Linear Search
While Loops and Data Structures
Using Selection in Programs
Iteration in Flowcharts
Converting Between Flowcharts and Pseudocode
Tracing WHILE Loops
Testing Programs
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