Convert exponential notation of number (e+) to 10^ in JavaScript

Question

I have a script, where I can convert gigs to megs to kilobytes to bytes to bits.

After that it uses the .toExponential function to turn it into scientific notation.

But I want it to change into an exponent, instead of it being +e# I want it to be ^#, any way I can change it to print that way instead, if not, anyway I can alter the string to change +e to ^?

Code:

console.log('calculator');
const gigabytes = 192;
console.log(`gigabytes equals ${gigabytes}`);
var megabytes = gigabytes * 1000;
console.log(`megabytes = ${megabytes}`);
var kilabytes = megabytes * 1000;
console.log (`kilabytes = ${kilabytes}`);
bytes = kilabytes * 1000;
console.log(`bytes = ${bytes}`);
bites = bytes * 8;
console.log(`bites are equal to ${bites}`);
console.log (bites.toExponential());

Does this answer your question? [How to replace all occurrences of a string in Javascript?](https://stackoverflow.com/questions/1144783/how-to-replace-all-occurrences-of-a-string-in-javascript) — Mike B, Mar 01 '21 at 19:49

Ajeet Shah · Answer 1 · 2021-03-01T20:35:51.017

2

You can use .replace:

const bytes = '1.536e+12'
console.log(convert(bytes))

const inputs = [
  '1.536e+12',
  '1.536e-12',
  '123',
  '-123',
  '123.456',
  '-123.456',
  '1e+1',
  '1e-1',
  '0e+0',
  '1e+0',
  '-1e+0'
]

function convert(value) {
  return value.replace(/e\+?/, ' x 10^')
}

inputs.forEach(i => console.log(convert(i)))

edited Mar 01 '21 at 20:35

answered Mar 01 '21 at 19:51

Ajeet Shah

18,551
8
57
87

score 1 · Answer 2 · answered Mar 01 '21 at 19:49

1

You can just replace e+ with ^ using replace

console.log('calculator');
const gigabytes = 192;
console.log(`gigabytes equals ${gigabytes}`);
var megabytes = gigabytes * 1000;
console.log(`megabytes = ${megabytes}`);
var kilabytes = megabytes * 1000;
console.log (`kilabytes = ${kilabytes}`);
bytes = kilabytes * 1000;
console.log(`bytes = ${bytes}`);
bites = bytes * 8;
console.log(`bites are equal to ${bites}`);
console.log (bites.toExponential().replace(/e\+/g, '^'));

answered Mar 01 '21 at 19:49

Maheer Ali

35,834
5
42
73

2

But presumably the requested format would actually look like `1.536 x 10^12`. – Scott Sauyet Mar 01 '21 at 19:54
nevermind I mistook what I was looking for, your right, I forgot about The more exact parts such as 1.536. – Joshua Searles Mar 01 '21 at 20:04

score 1 · Answer 3 · answered Mar 01 '21 at 19:54

1

Instead of using

console.log(bites.toExponential);

You may need to use

bites = bites.toExponential;
console.log(bites.replace(“e+”, “*10^”);

Hope this helped!

answered Mar 01 '21 at 19:54

PositivelyChargedElectron

54
6

Convert exponential notation of number (e+) to 10^ in JavaScript

3 Answers3