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---
title: optval
---
# Default values for optional arguments
[TOC]
## `optval` - fallback value for optional arguments
### Status
Experimental
### Description
Returns `x` if it is present, otherwise `default`.
This function is intended to be called in a procedure with one or more `optional` arguments, in order to conveniently fall back to a default value if an `optional` argument is not present.
### Syntax
`result = ` [[stdlib_optval(module):optval(interface)]] `(x, default)`
### Arguments
`x`: Shall be of type `integer`, `real`, `complex`, or `logical`, or a scalar of type `character`.
`default`: Shall have the same type, kind, and rank as `x`.
### Return value
If `x` is present, the result is `x`, otherwise the result is `default`.
### Example
```fortran
{!example/optval/example_optval.f90!}
```
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