## Function: COMMON-LISP:DIGIT-CHAR-P
[![package](https://img.shields.io/badge/Package-COMMON--LISP-5f9ea0.svg?style=social&colorA=999999)](../) [![type](https://img.shields.io/badge/Type-Function-5f9ea0.svg?style=social&colorA=999999)](../#function) [![clhs](https://img.shields.io/badge/CLHS-DIGIT--CHAR--P-5f9ea0.svg?style=social&colorA=999999)](http://www.lispworks.com/documentation/HyperSpec/Body/f_digi_1.htm) [![github](https://img.shields.io/badge/GitHub-View_the_source-5f9ea0.svg?style=social&colorA=999999&logo=github)](https://github.com/sbcl/sbcl/blob/master/src/code/target-char.lisp/) 

> If char is a digit in the specified radix, returns the fixnum for which
> that digit stands, else returns NIL.

### Lambda list
```cl
(char &optional sb-impl::radix)
```