parseInt，parseFloat

document.write(parseInt("10") + "<br>");  =>  10

document.write(parseInt("10.33") + "<br>");  =>  10

document.write(parseInt("34 45 66") + "<br>");  =>  34

document.write(parseInt(" 60 ") + "<br>");  =>  60

document.write(parseInt("40 years") + "<br>");  =>  40

document.write(parseInt("He was 40") + "<br>");  =>  NaN

 

document.write(parseFloat("10") + "<br>");  =>  10

document.write(parseFloat("10.33") + "<br>");  =>  10.33

document.write(parseFloat("34 45 66") + "<br>");  =>  34

document.write(parseFloat(" 60 ") + "<br>");  =>  60

document.write(parseFloat("40 years") + "<br>");  =>  40

document.write(parseFloat("He was 40") + "<br>");  =>  NaN

posted @ 2019-03-26 11:45  ameame  阅读(264)  评论(0)  编辑  收藏  举报