# ISNUMBER

**The function ISNUMBER outputs TRUE if the input is a Number.**

This function takes any data type as input. It outputs a [Boolean](../../variable-data-types/the-boolean-variable-data-type) : **TRUE** if the input is a [Number](../../variable-data-types/the-number-variable-data-type) , **FALSE** if it isn't.

#### Declaration

```javascript
ISNUMBER(value) -> result
```

#### Parameters

**value** (required, type: _any_)

The value that may or may not be a Number.

#### Return Values

**result** (type: _Boolean_)

The result of checking if the given input is a Number; **TRUE** means that it is and **FALSE** means that it isn't.

#### Examples

The following example checks to see if the number 1.5 is a number. It is:

```javascript
ISNUMBER(1.5) -> TRUE
```

The following example checks to see if the string "1.5" is a number. It isn't:

```javascript
ISNUMBER("1.5") -> FALSE
```
