# Loop

## Function
 loop is used to repeatedly execute a section of code. BT provides three types of loops: `for` supports times, intervals, infinite loops and set traversals, `while` loops based on conditions, and `loop` is reserved as a compatible infinite loop writing method.

## Loop control
- `break`: End the current loop.
- `continue`: Skip the current round and enter the next round.
- `break:label`/`continue:label`: Control loops of specified tags in nested loops.

## Examples
```bt
for index, value in [1, 2, 3] {
    if value == 2 {
        continue
    }
    println value
}
```

## Syntax document
- [for](/en/docs/loop/for): count loop, interval loop, infinite loop, and traverse arrays, objects and strings.
- [while](/en/docs/loop/while): Loop conditionally.
- [loop](/en/docs/loop/loop): Compatible infinite loop writing method, where the loop body determines when to exit.