how to round the result to the first deciaml number in js code example

Example 1: javascript round to 2 digits

var num = 2;
var roundedString = num.toFixed(2);// 2.00

Example 2: rounding number to x decimals javascript

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

Example 3: round number 2 decimals javascript

Math.round((num + Number.EPSILON) * 100) / 100