<!DOCTYPE html>
<html>
<head>
<meta charset="unicode"/>
<title>20121011</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: -10 = " + -90 + "<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: 10 * 20 = " + 10*20 + "<br/>");
document.write("除法運算: 500 / 50 = " + 500/50 + "<br/>");
document.write("餘數運算: 100 % 40 = " + 100%40 + "<br/>");
document.write("加法運算: 10 + 90 = " + (10+90) + "<br/>");
document.write("減法運算: 5 - 1 = " + (5-1) + "<br/><hr/>");
// 測試Pre-/Post- 運算子
x = 100;
y = 1;
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>
算術運算子的使用
負號運算: -10 = -90
遞增運算: A++ = 11
遞減運算: A-- = 9
乘法運算: 10 * 20 = 200
除法運算: 500 / 50 = 10
餘數運算: 100 % 40 = 20
加法運算: 10 + 90 = 100
減法運算: 5 - 1 = 4
x++ = 100:x = 101
--y = 0:y = 0
字串連接: JavaScript是一種網頁設計技術
