| Description: | Produces the arctangent of X. | ||
| Class: | Elemental function; Generic | ||
| Arguments: | X must be of type real. | ||
| Results: | The result type is the same as X and is expressed in radians. The value lies in the range -pi/2 to pi/2. | ||
| Specific Name | Argument Type | Result Type |
|---|---|---|
| ATAN | REAL(4) | REAL(4) |
| DATAN | REAL(8) | REAL(8) |
| QATAN | REAL(16) | REAL(16) |
Examples
ATAN (1.5874993) has the value 1.008666.