ISALNUM - check for alphanumeric character.
(ANSI Standard)
Usage:
#include <ctype.h>
i = isalnum(c);
Where:
- int c;
- is the character you want to check.
- int i;
- is 1 if "c" is alphanumeric, and 0 otherwise.
Description:
"isalnum" determines whether a character is
alphanumeric.
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