# Introduction and purpose — Dart

Source: https://www.geekswithgeeks.com/en/dart/dart-01

> Understand Introduction and purpose as a useful part of Dart.

## The essential idea

**Introduction and purpose** gives you one practical part of Dart. 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 Dart from source to output.](assets/figures/dart/dart-learning-map.svg) — Figure 1.1 — Keep the complete path visible.

## Avoid this trap

Do not memorize **Introduction and purpose** 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 Introduction and purpose?

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

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