/* * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. *//** * Checks for binary addition operator. * * @test * @run */// number additionvar x = Math.PI + Math.E;print(typeof(x));print(x);// string concatenationx = "hello, " + "world";print(typeof(x));print(x);// string + numberx = "E is " + Math.E;print(typeof(x));print(x);// number + stringx = Math.PI + " is PI";print(typeof(x));print(x);// number + undefinedx = Math.E + undefined;print(typeof(x));print(x);x = undefined + Math.PI;print(typeof(x));print(x);// object with "valueOf" method added to numbervar obj = { valueOf: function() { return 44.55; }};x = 45.66 + obj;print(typeof(x));print(x);x = obj + 3.14;print(typeof(x));print(x);// object with "toString" method added to numbervar obj2 = { toString: function() { return "obj2.toString"; }};x = "hello, " + obj2;print(typeof(x));print(x);x = obj2 + " hello";print(typeof(x));print(x);