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javascript round half even

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Obedient Oyster answered on November 17, 2022 Popularity 5/10 Helpfulness 1/10

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answer javascript round half even

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function evenRound(num, decimalPlaces) {
    var d = decimalPlaces || 0;
    var m = Math.pow(10, d);
    var n = +(d ? num * m : num).toFixed(8); // Avoid rounding errors
    var i = Math.floor(n), f = n - i;
    var e = 1e-8; // Allow for rounding errors in f
    var r = (f > 0.5 - e && f < 0.5 + e) ?
                ((i % 2 == 0) ? i : i + 1) : Math.round(n);
    return d ? r / m : r;
}

console.log( evenRound(1.5) ); // 2
console.log( evenRound(2.5) ); // 2
console.log( evenRound(1.535, 2) ); // 1.54
console.log( evenRound(1.525, 2) ); // 1.52

Popularity 5/10 Helpfulness 1/10 Language javascript

Source: stackoverflow.com

Tags: javascript

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Obedient Oyster

Contributed on Nov 17 2022

Obedient Oyster

0 Answers Avg Quality 2/10

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