abs.js (1118B)
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 /** 22 * Computes the absolute value of `x`. 23 * 24 * @param {number} x - input value 25 * @returns {number} absolute value 26 * 27 * @example 28 * var v = abs( -1.0 ); 29 * // returns 1.0 30 * 31 * @example 32 * var v = abs( 2.0 ); 33 * // returns 2.0 34 * 35 * @example 36 * var v = abs( 0.0 ); 37 * // returns 0.0 38 * 39 * @example 40 * var v = abs( -0.0 ); 41 * // returns -0.0 42 * 43 * @example 44 * var v = abs( NaN ); 45 * // returns NaN 46 */ 47 function abs( x ) { 48 if ( x < 0.0 ) { 49 return -x; 50 } 51 return x; 52 } 53 54 55 // EXPORTS // 56 57 module.exports = abs;