初识JavaScript
JavaScript了解
var a = 10 console.log(isNaN(a)) //false var str = 'abc' console.log(isNaN(Number(str)))//true
新闻名称：初识JavaScript
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var a = 10 console.log(isNaN(a)) //false var str = 'abc' console.log(isNaN(Number(str)))//true
