# Numbers only

### From LimeSurvey Manual

### Numbers only (numbers_only)

**Description**

If you enable this option, the participant can only enter numbers in the text box(es).

For the **equation question types**, this setting indicates that the result could only be a number, not a string. This will guarantee proper calculations/conversions in follow-up equations regarding the decimal mark.

**Behavior by question type**

**Default**: If the subject enters a value that is not a number, that value is immediately cleared from the text box so that the subject can enter an appropriate value.**Array (Texts)**: If the**numbers only**option is disabled, the "Show totals for" and "Show grand total" options will be overruled, while the total text boxes will**not**be displayed.**Equation**: Enabling this option will force the equation results to be converted to a numeric value. If the equation result is not a number (and not blank), the equation will return NaN, being saved as an empty string in the response table.

**Available options**

- On
- Off (default)