[#HexDigit]
= HexDigit
:mrdocs:

Return the numeric value of a hexadecimal digit character&period;

== Synopsis

Declared in `&lt;crypto&sol;hex&lowbar;base&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
signed char
HexDigit(char c);
----

== Return Value

The value 0&hyphen;15 for a valid digit, or &hyphen;1 if `c` is not a hexadecimal digit&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *c*
| The hexadecimal digit character to decode&period;
|===


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