C++ equivalent of NumPy/PHP rad2deg

In order to convert radians to degrees, PHP provides the rad2deg function whereas Python’s NumPy library provides np.rad2deg.

In C++ there is no standard function to convert radians to degrees.

However, you can use this simple snippet:

#define _USE_MATH_DEFINES
#include <cmath>

/**
 * Convert the angle given in radians to degrees.
 */
template<typename F>
F rad2deg(F angle) {
    return angle * 180.0 / M_PI;
}

This will work for double, float etc. and returns the angle in degrees.

The formula is pretty simple: