Tiny example
Find the smallest
Look through a list and keep track of the smallest number seen so far.
Every step is simple, but together the steps solve the whole task.
Algorithms
Clear step-by-step methods for solving a problem.
An algorithm is a rulebook for what to do next. Good algorithms are precise enough that someone else, or a computer, could follow them.
Why it matters
Algorithms power search, route finding, optimisation, sorting, simulations and many interactive tools.
Things to watch for
- Writing a vague instruction where a precise step is needed.
- Forgetting to say when the algorithm stops.
- Assuming a faster-looking method always gives the correct answer.
Where it connects
algorithmsdecision mathscomputer science