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### 5.21 `strchr`—search for character in string

Synopsis

         #include <string.h>
         char * strchr(const char *string, int c);

Description
This function finds the first occurence of c (converted to a char) in the string pointed to by string (including the terminating null character).

Returns
Returns a pointer to the located character, or a null pointer if c does not occur in string.

Portability
`strchr` is ANSI C.

`strchr` requires no supporting OS subroutines.