Math.atan()

The Math.atan() function returns the inverse tangent (in radians) of a number.

Syntax

Math.atan(x)

Parameters

• x
  • : A number.

Return value

The inverse tangent (angle in radians between $-\frac{\pi}{2}$ and $\frac{\pi}{2}$, inclusive) of x. If x is Infinity, it returns $\frac{\pi}{2}$. If x is -Infinity, it returns $-\frac{\pi}{2}$.

Description

Because atan() is a static method of Math, you always use it as Math.atan(), rather than as a method of a Math object you created (Math is not a constructor).