# The `Boolean.toString` function

## Returns correct result when passed `true`

### Juttle

    emit -from Date.new(0) -limit 1 | put result = Boolean.toString(true) | view result

### Output

    { "time": "1970-01-01T00:00:00.000Z", result: "true" }

## Returns correct result when passed `false`

### Juttle

    emit -from Date.new(0) -limit 1 | put result = Boolean.toString(false) | view result

### Output

    { "time": "1970-01-01T00:00:00.000Z", result: "false" }

## Produces an error when passed an argument of invalid type

### Juttle

    emit -from Date.new(0) -limit 1 | put result = Boolean.toString(null) | view result

### Warnings

  * Invalid argument type for "Boolean.toString": expected boolean, received null.