Iteration (FOR, WHILE & REPEAT loops) in pseudocode (iGCSE Computer Science)

This 23 page resource is designed to introduce students to the use of iteration (FOR, WHILE & REPEAT loops) in pseudocode, as required for the new iGCSE Computer Science specification (from 2023).

The first section covers FOR loops. Some simple FOR loops using Python are given as examples, and then the equivalent commands in pseudocode. Exercise A has over 20 questions for students to practise writing algorithms that include use of FOR loops, including some questions where data is stored in 1D or 2D lists - useful practice in preparation for the 15-mark unseen scenario question at the end of paper 2.

The next section covers WHILE loops. Some simple WHILE loops using Python are given as examples, and then the equivalent commands in pseudocode. Exercise B has over 10 questions for students to practise writing algorithms that include use of a WHILE loop.

The final section covers REPEAT loops. Some simple REPEAT loops in pseudocode are given as examples, and then a contrast is made between WHILE and REPEAT loops. Exercise C has over 10 questions for students to practise writing algorithms that include use of a REPEAT loop.

Full solutions to the exercises are included.