FQL v4 will be decommissioned on June 30, 2025. Ensure that you complete your migration from FQL v4 to FQL v10 by that date.

Fauna accounts created after August 21, 2024 must use FQL v10. These accounts will not be able to run FQL v4 queries or access the v4 Dashboard.

For more details, see the v4 EOL announcement and migration guide. Contact support@fauna.com with any questions.

Atan

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

 
Atan( value )
atan( value )
Atan( value )
Atan( value )
Atan( value )
Atan( value )

Description

The Atan function is a trigonometric function which calculates ratios of the lengths of the sides of right triangles. Atan returns the arc tangent of a number.

Parameters

Parameter Type Definition and Requirements

value

Number

The Number whose arc tangent should be returned.

Returns

A Number which is the arc tangent of value.

Examples

The following query returns the arc tangent of 0.5:

client.query(
  q.Atan(0.5)
)
.then((ret) => console.log(ret))
.catch((err) => console.error(
  'Error: [%s] %s: %s',
  err.name,
  err.message,
  err.errors()[0].description,
))
0.4636476090008061
result = client.query(
  q.atan(0.5)
)
print(result)
0.4636476090008061
result, err := client.Query(
	f.Atan(0.5))

if err != nil {
	fmt.Fprintln(os.Stderr, err)
} else {
	fmt.Println(result)
}
0.4636476090008061
try
{
    Value result = await client.Query(
        Atan(0.5)
    );

    Console.WriteLine(result);
}
catch (Exception e)
{
    Console.WriteLine($"ERROR: {e.Message}");
}
DoubleV(0.4636476090008061)
System.out.println(
    client.query(
        Atan(Value(0.5))
    ).get());
0.4636476090008061
Atan(0.5)
0.4636476090008061
Query metrics:

  •    bytesIn:  12

  •   bytesOut:  31

  • computeOps:   1

  •    readOps:   0

  •   writeOps:   0

  •  readBytes:   0

  • writeBytes:   0

  •  queryTime: 3ms

  •    retries:   0

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