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14 lines
415 B
JavaScript
14 lines
415 B
JavaScript
function precise_round(num, dec){
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if ((typeof num !== 'number') || (typeof dec !== 'number'))
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return false;
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var num_sign = num >= 0 ? 1 : -1;
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return (Math.round((num*Math.pow(10,dec))+(num_sign*0.0001))/Math.pow(10,dec)).toFixed(dec);
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}
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console.log(precise_round(12.375,2));
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console.log(precise_round(12.37499,2));
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console.log(precise_round(-10.3079499, 3)); |