# Variables and values — Swift

Source: https://www.geekswithgeeks.com/en/swift/swift-03

> Understand Variables and values as a useful part of Swift.

## The essential idea

**Variables and values** gives you one practical part of Swift. Start by naming the input, the change, and the expected result. This mental model matters before any syntax rule.

## Place this on the learning path

A complete program moves from an idea to source code and a checked result. This topic is one step in that path.

![A learning path for Swift from source to output.](assets/figures/swift/swift-learning-map.svg) — Figure 2.1 — Keep the complete path visible.

## Avoid this trap

Do not memorize **Variables and values** in isolation. Change one value in a small example and use feedback to correct your understanding.

Quick check

**Quiz:** What is a good first practice for Variables and values?

- [x] Run one small focused example.
- [ ] Memorize without testing.
- [ ] Ignore feedback.

*Answer:* Run one small focused example.. Small experiments reveal cause and effect.