---
name: "isideogram"
section: "3"
platform: "macos"
package: "Libc"
version: "1752.120.2"
release: "macOS 26.5"
platforms: ["freebsd", "macos"]
url: "https://new.carta.tech/isideogram"
---

# isideogram(3)

ideographic character test

## NAME

**isideogram** – ideographic character test

## LIBRARY

Standard C Library (libc, -lc)

## SYNOPSIS

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

*int*\

**isideogram**(*int c*);

## DESCRIPTION

The **isideogram**() function tests for an ideographic character.

## RETURN VALUES

The **isideogram**() function returns zero if the character tests false and returns non-zero if the character tests true.

## SEE ALSO

[ctype(3)](/ctype/3.md), [isphonogram(3)](/isphonogram/3.md), [iswideogram(3)](/iswideogram/3.md), isalnum\_l

## HISTORY

The **isideogram**() function appeared in 4.4BSD.