如何用科学计数法格式化数字以在Javascript中显示更少的数字？

Question

For example, I have a number which is 1.3685999999999998e+35 but I just want to display 1.368e+35. I tried toFixed and toPrecision but nothing works.

Answer 1

You need to use Number.prototype.toExponential :

 var x = 11827361827361872361263812631827361823618723; console.log(x.toExponential(2)); console.log(x.toExponential(3)); console.log(x.toExponential(10));