Jan Walraven
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  • Posted on March 4, 2012

    For rounding decimals you can use the built-in JavaScript methods toFixed or toPrecision.

    
    var num = 10;
    var result = num.toFixed(2); // result will equal 10.00
     
    num = 930.9805;
    result = num.toFixed(3); // result will equal 930.981
     
    num = 500.2349;
    result = num.toPrecision(4); // result will equal 500.2
     
    num = 5000.2349;
    result = num.toPrecision(4); // result will equal 5000
     
    num = 555.55;
    result = num.toPrecision(2); // result will equal 5.6e+2