# Dart While Loop

In Dart, the `while` loop is used to execute a block of code repeatedly as long as a specified condition is true. The syntax of a `while` loop is as follows:

```dart
while (condition) {
  // Statements to execute
}
```

Here's a breakdown of each part:

* `condition`: This is the condition that is evaluated before each iteration of the loop. If the condition is true, the loop continues; otherwise, the loop terminates.
    
* `{...}`: This block contains the statements to execute for each iteration of the loop.
    

Here's an example of using a `while` loop:

```dart
var i = 0;
while (i < 5) {
  print('Iteration $i');
  i++;
}
```

In this example:

* `var i = 0` initializes a variable `i` to `0`.
    
* `i < 5` is the condition that is evaluated before each iteration. As long as `i` is less than `5`, the loop continues.
    
* `print('Iteration $i')` prints the value of `i` for each iteration.
    
* `i++` increments the value of `i` by `1` after each iteration.
    

The loop will execute five times, printing:

```dart
Iteration 0
Iteration 1
Iteration 2
Iteration 3
Iteration 4
```

It's important to ensure that the condition in a `while` loop eventually becomes false; otherwise, you may end up with an infinite loop.

The `while` loop is useful when you don't know in advance how many times you need to execute the loop, and you want to continue looping until a certain condition is met.