rad2deg

Convert an angle from radians to degrees.

Usage

var rad2deg = require( '@stdlib/math/base/special/rad2deg' );

rad2deg( x )

Converts an angle from radians to degrees.

var d = rad2deg( 3.141592653589793/2.0 );
// returns 90.0

d = rad2deg( -3.141592653589793/4.0 );
// returns -45.0

d = rad2deg( NaN );
// returns NaN

Notes

Due to finite precision, canonical values may not be returned. For example,

var d = rad2deg( 3.141592653589793/6.0 );
// returns 29.999999999999996

Examples

var randu = require( '@stdlib/random/base/randu' );
var TWO_PI = require( '@stdlib/constants/float64/two-pi' );
var rad2deg = require( '@stdlib/math/base/special/rad2deg' );

var r;
var d;
var i;

for ( i = 0; i < 100; i++ ) {
    r = randu() * TWO_PI;
    d = rad2deg( r );
    console.log( 'radians: %d => degrees: %d', r, d );
}

C APIs

Usage

#include "stdlib/math/base/special/rad2deg.h"

stdlib_base_rad2deg( x )

Converts an angle from radians to degrees.

double x = 3.141592653589793/2.0;
double d = stdlib_base_rad2deg( x );
// returns 90.0

x = -3.141592653589793/4.0;
d = stdlib_base_rad2deg( x );
// returns -45.0

The function accepts the following arguments:

x: [in] double input value (in radians).

double stdlib_base_rad2deg( const double x );

Examples

#include "stdlib/math/base/special/rad2deg.h"
#include "stdlib/constants/float64/two_pi.h"
#include <stdlib.h>
#include <stdio.h>

int main( void ) {
    double x;
    double d;
    int i;

    for ( i = 0; i < 100; i++ ) {
        x = (double)rand() / (double)RAND_MAX * STDLIB_CONSTANT_FLOAT64_TWO_PI;
        d = stdlib_base_rad2deg( x );
        printf( "radians: %lf => degrees: %lf\n", x, d );
    }
}