Setup and first example

The essential idea

Setup and first example 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.

Run a tiny experiment

Use a minimal example. Predict what changes, run it, then explain the observed result.

// Explore Setup and first example with one focused example.
value = 0
print(value)

Output:

0

Avoid this trap

Do not memorize Setup and first example in isolation. Change one value in a small example and use feedback to correct your understanding.

Quick check

Quick check: What is a good first practice for Setup and first example?

• Run one small focused example.
• Memorize without testing.
• Ignore feedback.