Javascript's Unruly Fractions


I just stumbled across a new factoid regarding javascript. Occasionally JS will throw unneeded decimal places on to float multiplication. For example: 

0.1 * 0.2  // will show 0.020000000000000004

This can be remedied by a couple libraries such as BigDecimal and BigNumber. If you aren't too concerned with exact fractions then it's probably easier to use a Math.round

written by jackson

Post new comment

The content of this field is kept private and will not be shown publicly.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Allowed HTML tags: <a> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd> <p> <pre>
  • Syntax highlight code surrounded by the {syntaxhighlighter SPEC}...{/syntaxhighlighter} tags, where SPEC is a Syntaxhighlighter options string or "class="OPTIONS" title="the title".
  • Lines and paragraphs break automatically.
  • E-Mail addresses are hidden with reCAPTCHA Mailhide.

More information about formatting options

Complete this form and then pat yourself on the back.