How to Avoid Scientific Notation When Printing Large Numbers in JavaScript?

How to Print Large Numbers Without Scientific Notation in JavaScript?

JavaScript automatically converts integers with over 21 digits into scientific notation when they are used in a string context. This can be problematic when you need to display large numbers, such as in a URL.

Solution:

To prevent the conversion to scientific notation, you can use one of the following methods:

Number.toFixed:

This method can be used to fix the number of decimal places, but it uses scientific notation for numbers greater than or equal to 1e21.

Custom Function:

You can create a custom function to handle this conversion:

function toFixed(x) {
  if (Math.abs(x) < 1.0) {
    var e = parseInt(x.toString().split('e-')[1]);
    if (e) {
        x *= Math.pow(10,e-1);
        x = '0.' + (new Array(e)).join('0') + x.toString().substring(2);
    }
  } else {
    var e = parseInt(x.toString().split('+')[1]);
    if (e > 20) {
        e -= 20;
        x /= Math.pow(10,e);
        x += (new Array(e+1)).join('0');
    }
  }
  return x;
}

BigInt:

JavaScript now supports BigInt natively (supported by Chromium-based browsers and Firefox). You can use BigInt to represent and handle large integers without worrying about scientific notation:

const n = 13523563246234613317632;
console.log("BigInt: " + BigInt(n).toString());

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