OCR GCSE Computing

Algorithms and Pseudocode

An algorithm is a set of step-by-step rules, written for a computer, that explain how the problem is to be solved.

Pseudocode looks like a programming language, but isn't. It's a cross between English and a generic-looking programming language. It's a halfway point between describing the program in English and having a complete program written in programming language.

Flow Chart

Selection = When one sequence of instructions or another, but not both, is executed. This depends on the outcome of an earlier instruction. Iteration = Takes place when one or…