<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Ch5_5_2.htm</title>
</head>
<body>
<h2>算術運算子的使用</h2>
<hr>
<script>
var x, y;
var intInc = 10;
var intDec = 10;
var strTitle1 = "JavaScript是"
var strTitle2 = "一種網頁設計技術"
document.write("負號運算: -7 = " + -7 + "<br/>");
intInc++;
document.write("遞增運算: A++ = " + intInc + "<br/>");
intDec--;
document.write("遞減運算: A-- = " + intDec + "<br/>");
document.write("乘法運算: 5 * 6 = " + 5*6 + "<br/>");
document.write("除法運算: 7 / 2 = " + 7/2 + "<br/>");
document.write("餘數運算: 7 % 2 = " + 7%2 + "<br/>");
document.write("加法運算: 4 + 3 = " + (4+3) + "<br/>");
document.write("減法運算: 4 - 3 = " + (4-3) + "<br/><hr/>");
// 測試Pre-/Post- 運算子
x = 10;
y = 10;
document.write("x++ = " +x+++":x = " + x + "<br/>");
document.write("--y = " +--y+":y = " + y + "<br/><hr/>");
document.write("字串連接: " + (strTitle1+strTitle2) + "<br/>");
</script>
</body>
</html>
顯示結果：
算術運算子的使用
