arithmetic.js

来自「这是《JavaScript学习源代码》一书的源代码」· JavaScript 代码 · 共 15 行

var addnum = 20 + 30;
var addstr = "I love " + "JavaScript";
var sub = 35.75 - 28.25;
var mul = 8 * 50;
var mod =  65 % 2;
var inc = 5 ; inc = ++inc; 
var dec = 5 ; dec = --dec;
var result = "Addnum is " + addnum + "\n";
result += "Addstr is " + addstr + "\n";
result += "Sub is " + sub + "\n";
result += "Mul is " + mul + "\n";
result += "Mod is " + mod + "\n";
result += "Inc is " + inc + "\n";
result += "Dec is " + dec + "\n";
alert ( result );