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

# isabloperinexpr(3)

tests if an operator appears in an expression.

## NAME

isabloperinexpr - tests if an operator appears in an expression.

## SYNOPSYS

```
#include "abl101.h"
int isabloperinexpr( Expr, Oper )
  chain_list ∗Expr;
  long        Oper;
```

## PARAMETERS

- *Expr*

  Expression where to search.

- *Oper*

  Operator to search.

## DESCRIPTION

**isabloperinexpr** tests if *Oper* appears in *Expr*.\

## RETURN VALUE

**isabloperinexpr** returns 1 if *Oper* 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", isabloperinexpr( Expr, ABL_AND ) );
```

## SEE ALSO

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