/** * @license Apache-2.0 * * Copyright (c) 2020 The Stdlib Authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ 'use strict'; // MODULES // var isInteger = require( './../../is-integer' ).isPrimitive; var sqrt = require( '@stdlib/math/base/special/sqrt' ); var floor = require( '@stdlib/math/base/special/floor' ); // MAIN // /** * Tests if a value is a number primitive having a value which is a square number. * * @param {*} value - value to test * @returns {boolean} boolean indicating if a value is a number primitive having a value which is a square number * * @example * var bool = isSquareNumber( 4.0 ); * // returns true * * @example * var bool = isSquareNumber( new Number( 4.0 ) ); * // returns false */ function isSquareNumber( value ) { var n; if ( !isInteger( value ) ) { return false; } n = floor( sqrt( value ) + 0.5 ); return n*n === value; } // EXPORTS // module.exports = isSquareNumber;