Home >Web Front-end >JS Tutorial >Several examples of methods to get the number of decimal places javascript
1.通过substring截取。
function getnum() { var num = 22.123456; var result = num.substring(0,s.indexOf(".")+3); alert(result); }
2. 正则表达式。
function getnum() { var num = 22.123456; var aNew; var re = /([0-9]+\.[0-9]{2})[0-9]*/; aNew = num.replace(re,"$1"); alert(aNew); }
3.数据类型保留上。
function getnum() { var num=22.123456; alert( Math.round(num*100)/100); }
4.toFixed方法
alert(num.toFixed(2));
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