NAME

SDL_isalnum - Query if a character is alphabetic (a letter) or a number.

SYNOPSIS

#include <SDL3/SDL_stdinc.h>

int SDL_isalnum(int x);

DESCRIPTION

WARNING: Regardless of system locale, this will only treat ASCII values for English 'a-z', 'A-Z', and '0-9' as true.

FUNCTION PARAMETERS

x

character value to check.

RETURN VALUE

Returns non-zero if x falls within the character class, zero otherwise.

THREAD SAFETY

It is safe to call this function from any thread.

AVAILABILITY

This function is available since SDL 3.2.0.