Opposite of Number.toExponential in JS

You can use toPrecision with a parameter specifying how many digits you want to display:

x.toPrecision(31)

However, among the browsers I tested, the above code only works on Firefox. According to the ECMAScript specification, the valid range for toPrecision is 1 to 21, and both IE and Chrome throw a RangeError accordingly. This is due to the fact that the floating-point representation used in JavaScript is incapable of actually representing numbers to 31 digits of precision.

Use Number(string)

Example :

var a = Number("1.1e+2");

Return :

a = 110