- 01Setting up (what you'll need)
- 02Your first output (print)
- 03Variables and types (var and annotations)
- 04Null safety (? and !)
- 05Branching (the if statement)
- 06Repeating (the for loop)
- 07Writing your own function
- 08Repeating (the while loop)
- 09Working with lists (List)
- 10Working with maps (Map)
- 11Classes (object orientation)
- 12Constructors
- 13Inheritance
- 14Named arguments
- 15Asynchronous work (Future, async, await)
- 16Working with strings
- 17The switch statement
- 18The ternary operator
- 19Extension methods
- 20[Project] Build a small inventory system
Repeating (the while loop)
This lesson covers the while statement, which repeats only while a condition holds.
Writing while (condition) { ... } repeats the block for as long as the condition is true.
The sample code prints a number and increases it by one while count is 3 or less.
A common early stumble is forgetting to update the counter inside the loop and ending up in an infinite loop. Whenever you use a while statement, make sure something in the body eventually makes the condition false.
In professional work, while statements are used where the number of repetitions is not known in advance — "keep going until the input is valid", for example.
๐งช This site can't compile or run Dart directly, so it checks on the spot whether what you typed matches the reference code (scoring happens entirely in your browser โ nothing is sent anywhere).