# The `||` operator

## Returns correct result when used on two `Boolean`s

### Juttle

    emit -from Date.new(0) -limit 1
      | put ff = false || false
      | put ft = false || true
      | put tf = true || false
      | put tt = true || true
      | view result

### Output

    { "time": "1970-01-01T00:00:00.000Z", ff: false, ft: true, tf: true, tt: true }

## Short-circuits

### Juttle

    function produceTypeError() {
      return null < null;
    }

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

### Output

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

## Produces an error when used on invalid operand type combinations

### Juttle

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

### Errors

  * "||" operator: Invalid operand type (null).