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JavaScript to Standard Form converter (times 10^x)

/ Published in: JavaScript
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Use this to convert JavaScript numbers to official scientific standard form (e.g. 1.54 × 10^3)
Uses HTML <sup> tags and × symbol

Example:
var number = 4.223e20;
var stnd = standardForm(number);
// stnd = 4.223 x 10^20

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  1. function standardForm(s) {
  2. 	var indexOfE = s.indexOf('e');
  3. 	if(indexOfE != -1) {
  4. 		var s_start = s.substr(0,indexOfE) + ' × 10';
  5. 		var s_index = (s.charAt(indexOfE+1) == '+') ? s.substring(indexOfE+2,s.length) : s.substring(indexOfE+1,s.length);
  6. 		var s_end = '<sup>'+s_index+'</sup>';
  7. 		return s_start+s_end;
  8. 	} else {
  9. 		return s;
  10. 	}
  11. }

URL: http://astrophysicsonline.info/resources/calculator.php

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