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# Python2.x Python atan() Function [ Python Numbers](#) * * * ## Description **atan()** returns the arctangent of x in radians. * * * ## Syntax Here is the syntax for the atan() method: import math math.atan(x) **Note:** atan() cannot be accessed directly; you need to import the math module and then call the method via the math static object. * * * ## Parameters * x -- A numeric value. * * * ## Return Value Returns the arctangent of x in radians. * * * ## Example The following example demonstrates the use of the atan() method: #!/usr/bin/pythonimport math print "atan(0.64) : ", math.atan(0.64)print "atan(0) : ", math.atan(0)print "atan(10) : ", math.atan(10)print "atan(-1) : ", math.atan(-1)print "atan(1) : ", math.atan(1) The output of the above example is: atan(0.64) : 0.569313191101 atan(0) : 0.0 atan(10) : 1.4711276743 atan(-1) : -0.785398163397 atan(1) : 0.785398163397 [ Python Numbers](#)