(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_isdigit

Report if a character is a numeric digit.

Header File

Defined in <SDL3/SDL_stdinc.h>

Syntax

int SDL_isdigit(int x);

Function Parameters

int

x

character value to check.

Return Value

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

Remarks

WARNING: Regardless of system locale, this will only treat ASCII values '0' (0x30) through '9' (0x39), as true.

Thread Safety

It is safe to call this function from any thread.

Version

This function is available since SDL 3.1.3.

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CategoryAPI, CategoryAPIFunction, CategoryStdinc

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