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(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)


Report if a character is "printable".

Header File

Defined in <SDL3/SDL_stdinc.h>


int SDL_isprint(int x);

Function Parameters

x character value to check.

Return Value

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


Be advised that "printable" has a definition that goes back to text terminals from the dawn of computing, making this a sort of special case function that is not suitable for Unicode (or most any) text management.

WARNING: Regardless of system locale, this will only treat ASCII values ' ' (0x20) through '~' (0x7E) as true.

Thread Safety

It is safe to call this function from any thread.


This function is available since SDL 3.0.0.

CategoryAPI, CategoryAPIFunction, CategoryStdinc

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