Dart Academy · Lesson

Collection if and for

Build lists conditionally and in loops.

Logic Inside Literals

Sometimes a list's contents depend on a condition. Dart lets you put an if right inside the collection literal, so you build it in one place.

A collection if adds an element only when its condition is true. No condition met means that slot simply contributes nothing.

var nav = ['Home', if (loggedIn) 'Profile'];