# mustBeNumeric

Checks that value is numeric or raise an error.

## Syntax

* mustBeNumeric(var)
* mustBeNumeric(var, argPosition)
* C++: void mustBeNumeric(const ArrayOfVector& args, int argPosition)

## Input argument

* var - a variable: all supported types and classes that implement isnumeric method.
* argPosition - a positive integer value: Position of input argument.

## Description

**mustBeNumeric** checks that value is numeric or raise an error.

Empty values are ignored.

## Example

```matlab
mustBeNumeric(1)
mustBeNumeric([])
mustBeNumeric({1})
```

## See also

[isnumeric](../types/isnumeric).

## History

| Version | Description     |
| ------- | --------------- |
| 1.0.0   | initial version |

## Author

Allan CORNET
