40 lines
845 B
HTML
40 lines
845 B
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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</head>
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<body>
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<script>
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//字符串
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// let str0="xxxx";
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// let str1='xxxx';
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// let str2=`x xx x`;
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// console.log("我是"+"谁"+"?");
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// console.log(`你是谁 ${str0} ${"啥"}`);
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//数字
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//在js 中不区分整型和浮点型
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// console.log(123);
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// console.log(123.123);
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// let n0=999;
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// let n1=9.98;
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// console.log(typeof no);
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//布尔
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// console.log(true);
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// console.log(false);
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//特殊的
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// undefined 变量未定义
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// null 空值
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// NaN 非数字
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</script>
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</body>
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</html>
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