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Use of Algorithms
Algorithm is a big word but we use them (Algorithms) all the time. The following video will give you a good overview of this topic.
Pseudocode is not a programming language, it is a simple way of describing a set of instructions that does not have to use specific syntax.
Additional Reading and Resources
https://www.bbc.co.uk/bitesize/guides/z22wwmn/revision/5
Create your own: https://app.diagrams.net/