javascript - 格式编号始终显示2个小数位(Format number to always show 2 decimal places)

Question

I would like to format my numbers to always display 2 decimal places, rounding where applicable.(我想将数字格式化为始终显示2个小数位，并在适用的情况下四舍五入。)

Examples:(例子：) number display ------ ------- 1 1.00 1.341 1.34 1.345 1.35 I have been using this:(我一直在使用这个：) parseFloat(num).toFixed(2); But it's displaying 1 as 1 , rather than 1.00 .(但是它显示1为1而不是1.00 。)   ask by Varada translate from so

Answer 1

This works fine in FF4:(在FF4中可以正常工作：)

parseFloat(Math.round(num3 * 100) / 100).toFixed(2); Live Demo(现场演示) var num1 = "1"; document.getElementById('num1').innerHTML = parseFloat(Math.round(num1 * 100) / 100).toFixed(2); var num2 = "1.341"; document.getElementById('num2').innerHTML = parseFloat(Math.round(num2 * 100) / 100).toFixed(2); var num3 = "1.345"; document.getElementById('num3').innerHTML = parseFloat(Math.round(num3 * 100) / 100).toFixed(2); span { border: 1px solid #000; margin: 5px; padding: 5px; } <span id="num1"></span> <span id="num2"></span> <span id="num3"></span> Note that it will round to 2 decimal places, so the input 1.346 will return 1.35 .(请注意，它将四舍五入到小数点后1.346 ，因此输入1.346将返回1.35 。)