---
name: "getbddvarnodebyindex"
section: "3"
platform: "linux"
package: "alliance"
version: "5.1.1-3"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/getbddvarnodebyindex"
---

# getbddvarnodebyindex(3)

gives the bdd node of a variable.

## NAME

getbddvarnode - gives the **bdd** node of a variable.

## SYNOPSYS

```
#include "bdd101.h"
bddnode ∗getbddvarnodebyindex( BddSystem, Index )
  bddsystem ∗BddSystem;
  bddindex   Index;
```

## PARAMETERS

- *BddSystem*

  The **bdd** system.

- *Index*

  The **bdd** index.

## DESCRIPTION

**getbddvarnode** gives the **bdd** node of the **bdd** index *Index*, in the **bdd** system BddSystem. If a null pointer is given, the default **bdd** system is used. The function uses simply the table *BddSystem*-\>VAR\_NODE.\

## RETURN VALUE

**getbddvarnode** returns a pointer to the variable **bdd** node.

## ERRORS

**"index xxx out of range, error !"**

The *Index* parameter must be a valid index.

## EXAMPLE

```
#include "bdd101.h"
   bddsystem  ∗BddSystem;
   bddnode    ∗BddNode;
   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
   addbddvar( (bddsystem ∗)0, 0 );
   BddNode = getbddvarnodebyindex( (bddsystem ∗)0, 2 );
   ...
   destroybddsystem( (bddsystem ∗)0 );
```

## SEE ALSO

[**bdd**(1)](/bdd/1.md)