round to nearest decimal javascript code example

Example 1: math.round js 1 decimal

var number = 12.3456789;
var rounded = Math.round( number * 10 ) / 10;
// rounded is 12.3

Example 2: rounding number to x decimals javascript

let num = 12.5452411;
num = num.toFixed(3); // 12.545

Example 3: round to nearest decimal javascript

function round(value, precision) {
    var multiplier = Math.pow(10, precision || 0);
    return Math.round(value * multiplier) / multiplier;
}

Example 4: round to nearest decimal javascript

round(12345.6789, 2) // 12345.68
round(12345.6789, 1) // 12345.7

Example 5: round to nearest decimal javascript

round(456.7, 2).toFixed(2) // "456.70"

Example 6: round to nearest decimal javascript

round(12345.6789, -1) // 12350
round(12345.6789, -2) // 12300