What Is an Algorithm? (Everyday Examples)

Definition

An algorithm is a clear, step-by-step set of instructions to finish a task. Computers follow algorithms — but so do you, every day.

You already use algorithms

• Making tea: boil water → add tea → add milk and sugar → strain → serve.
• Brushing teeth, tying shoelaces, a cooking recipe — all are algorithms.

What makes a good algorithm?

1. Clear — each step means exactly one thing.
2. Ordered — the steps are in the right sequence.
3. Finite — it ends after a set number of steps.

Try it

Write the algorithm for "log in to an app". You'll find steps like: open app → tap login → enter username → enter password → tap submit. That precise thinking is the heart of computer science.