---
name: "ustrncat"
section: "3alleg4"
platform: "linux"
package: "allegro4-doc"
version: "2:4.4.3.1-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ustrncat/3alleg4"
---

# ustrncat(3alleg4)

Concatenates a string to another one, specifying size. Allegro game programming library.

## NAME

ustrncat - Concatenates a string to another one, specifying size. Allegro game programming library.

## SYNOPSIS

**#include \<allegro.h\>**

**char \*ustrncat(char \*dest, const char \*src, int n);**

## DESCRIPTION

This function is like ustrcat() except that no more than \`n' characters from \`src' are appended to the end of \`dest'. If the terminating null character in \`src' is reached before \`n' characters have been written, the null character is copied, but no other characters are written. If \`n' characters are written before a terminating null is encountered, the function appends its own null character to \`dest', so that \`n+1' characters are written. You should try to avoid this function because it is very easy to overflow the destination buffer. Use ustrzncat instead.

## RETURN VALUE

The return value is the value of \`dest'.

## SEE ALSO

**uconvert**(3alleg4), **ustrcat**(3alleg4), **ustrzncat**(3alleg4)