JavaScript 中的运算符是什么?
javascriptweb developmentfront end technology
我们来看一个简单的表达式"4 + 5 等于 9"。这里 4 和 5 称为操作数，"+"称为运算符。
JavaScript 支持以下类型的运算符。
- 算术运算符
- 比较运算符
- 逻辑(或关系)运算符
- 赋值运算符
- 条件(或三元)运算符
示例
下面是说明运算符示例的示例 −
<html>
<body>
<script>
var a = 33;
var b = 10;
var c = "Test";
var linebreak = "<br />";
document.write("a + b = ");
result = a + b;
document.write(result);
document.write(linebreak);
document.write("a - b = ");
result = a - b;
document.write(result);
document.write(linebreak);
document.write("a / b = ");
result = a / b;
document.write(result);
document.write(linebreak);
document.write("a % b = ");
result = a % b;
document.write(result);
document.write(linebreak);
document.write("a + b + c = ");
result = a + b + c;
document.write(result);
document.write(linebreak);
a = ++a;
document.write("++a = ");
result = ++a;
document.write(result);
document.write(linebreak);
b = --b;
document.write("--b = ");
result = --b;
document.write(result);
document.write(linebreak);
</script>
</body>
</html>
