---
name: "imult64"
section: "3diet"
platform: "linux"
package: "libowfat-dev"
version: "0.28-2"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/imult64/3diet"
---

# imult64(3diet)

integer multiplication with overflow checking

## NAME

imult64 - integer multiplication with overflow checking

## SYNTAX

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

int **imult64**(int64 a,int64 b,int64\* c);

## DESCRIPTION

imult64 does c=a\*b and returns 1.

In case of an integer overflow, imult64 leaves *c* alone and returns 0.

## SEE ALSO

[imult16(3)](/imult16/3.md), [imult32(3)](/imult32/3.md), [umult64(3)](/umult64/3.md)