C atan() Function

C atan() Function

The atan() function returns the arc-tangent (in radians) of the given number.

This function is defined in <math.h> header file.


C Compiler
#include <stdio.h> #include <math.h> int main() { printf("%lf", atan(2)); return 0; }


atan(data_type x)

Parameter Values

xRequiredSpecifies a number.

Return Value

NumberThe arc-tangent of the given number.
The return value will be between -π / 2 to π / 2.
The return value is represented in radians.

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