Calculates the arc tangent of a floating-point number.

[Format]

#include <mathf.h>

float atanf (float f);

[Parameters]

f Floating-point number for which arc tangent is to be computed

[Return values]

Arc tangent of f

[Remarks]

The atanf function returns the arc tangent in the range (–π/2, +π/2) by the radian.