---
layout: doc
title: floats / atan
---
# atan

### NAME

    atan() - return the arctangent of a float

### SYNOPSIS

    float atan( float f );

### DESCRIPTION

    Returns the arctangent of its argument, 'f', measured in radians.

### SEE ALSO

    acos(3), asin(3), cos(3), sin(3), tan(3)
