rad2deg.js (1157B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // VARIABLES // 22 23 // 180.0 / π 24 var CONST_180_DIV_PI = 57.29577951308232; 25 26 27 // MAIN // 28 29 /** 30 * Converts an angle from radians to degrees. 31 * 32 * @param {number} x - angle in radians 33 * @returns {number} angle in degrees 34 * 35 * @example 36 * var d = rad2deg( 3.141592653589793/2.0 ); 37 * // returns 90.0 38 * 39 * @example 40 * var d = rad2deg( -3.141592653589793/4.0 ); 41 * // returns -45.0 42 * 43 * @example 44 * var d = rad2deg( NaN ); 45 * // returns NaN 46 */ 47 function rad2deg( x ) { 48 return x * CONST_180_DIV_PI; 49 } 50 51 52 // EXPORTS // 53 54 module.exports = rad2deg;