pxt-core/common-docs/blocks/loops/while.md

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# While

Repeat code while a [Boolean](/blocks/logic/boolean) `condition` is true.

```block
while(true) {
}
```

The while loop has a *condition* that evaluates to a [Boolean](/blocks/logic/boolean) value. 

The condition is tested before any code runs. Which means that if the condition is false,
the code inside the loop doesn't execute.

## #examples