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

# isablnameinexpr(3)

## OPER

isablnameinexpr - tests if a name appears in an expression.

## SYNOPSYS

```
#include "abl101.h"
int isablnameinexpr( Expr, Name )
  chain_list ∗Expr;
  char       ∗Name;
```

## PARAMETERS

- *Expr*

  Expression where to search.

- *Name*

  Name to search.

## DESCRIPTION

**isablnameinexpr** tests if *Name* appears in *Expr*.\

## RETURN VALUE

**isablnameinexpr** returns 1 if *Name* appears in *Expr* and 0 otherwise.

## EXAMPLE

```
#include "abl101.h"
  chain_list ∗Expr;
   Expr = createablbinexpr( ABL_AND,
                            createablatom( "a" ),
                            createablatom( "b" ) );
   /* displays   1 */
   printf( "%d", isablnameinexpr( Expr, "a" ) );
```

## SEE ALSO

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