`Not`

This reference topic applies to FQL v4. Go to this page for the latest FQL v10 reference topics.

Not(value)

not_(value)

Not(value)

Not(value)

Not(value)

Not(value)

Description

The Not function computes the negation of a boolean value, returning true if its argument is "false", or false if its argument is "true".

Parameters

Parameter Type Definition and Requirements

Parameter	Type	Definition and Requirements
`value`	Boolean	A single Boolean value.

value

Boolean

A single Boolean value.

Returns

A Boolean value.

Examples

The following query returns false because an argument of "true" is provided:

client.query(
  q.Not(true)
)
.then((ret) => console.log(ret))
.catch((err) => console.error(
  'Error: [%s] %s: %s',
  err.name,
  err.message,
  err.errors()[0].description,
))

false

result = client.query(
  q.not_(True)
)
print(result)

False

result, err := client.Query(
	f.Not(true))

if err != nil {
	fmt.Fprintln(os.Stderr, err)
} else {
	fmt.Println(result)
}

false

try
{
    Value result = await client.Query(
        Not(true)
    );
    Console.WriteLine(result);
}
catch (Exception e)
{
    Console.WriteLine($"ERROR: {e.Message}");
}

BooleanV(False)

System.out.println(
    client.query(
        Not(Value(true))
    ).get());

false

Not(true)

false

Query metrics:

bytesIn: 12
bytesOut: 18
computeOps: 1
readOps: 0
writeOps: 0
readBytes: 0
writeBytes: 0
queryTime: 2ms
retries: 0