---
name: "SDL_strlen"
section: "3"
platform: "linux"
package: "libsdl3-doc"
version: "3.2.10+ds-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/SDL_strlen"
---

# SDL\_strlen(3)

This works exactly like strlen() but doesn't require access to a C runtime.

## NAME

SDL\_strlen - This works exactly like strlen() but doesn't require access to a C runtime.

## HEADER FILE

Defined in SDL3/SDL\_stdinc.h

## SYNOPSIS

```
#include "SDL3/SDL.h"
```

**size\_t SDL\_strlen(const char \*str);**

## DESCRIPTION

Counts the bytes in **str** , excluding the null terminator.

If you need the length of a UTF-8 string, consider using

**SDL\_utf8strlen** ().

## FUNCTION PARAMETERS

- *str*

  The null-terminated string to read. Must not be NULL.

## RETURN VALUE

Returns the length (in bytes, excluding the null terminator) of **src** .

## THREAD SAFETY

It is safe to call this function from any thread.

## AVAILABILITY

This function is available since SDL 3.2.0.

## SEE ALSO

**•**(3), [**SDL\_strnlen**(3)](/SDL_strnlen/3.md), **•**(3), [**SDL\_utf8strlen**(3)](/SDL_utf8strlen/3.md), **•**(3), [**SDL\_utf8strnlen**(3)](/SDL_utf8strnlen/3.md)