How to round figure if it is less then point 5 only in javascript

Question

I am trying to round my figure in JavaScript if it is less then any 0.5 figure. For Instance if I have value 3.4 then it should be 3 but if 3.5 then there is no need to round figure. I only want to round figure if it is less than 0.5. Here is the code I am using to round figure. But it rounded the figure in both cases

This code gives me result 3.5

function rounded(){
               var val = 3.5; 
                var rounded = Math.round(val);
                console.log("rounded",rounded);
}

and this code gives me result 4 but I want 3.5..

function rounded(){
                   var val = 3.6; 
                    var rounded = Math.round(val);
                    console.log("rounded",rounded);
    }

Any body can help me with this?

for 3.3 it gives me 3.5 but I want 3.0 for less then 3.5 I want 3.0 and for greater then 3.6 I want 3.5 — Azad Chouhan, Aug 22 '15 at 18:09
btw, the 1st code example you posted gives you 3 as a result. Math.round will round to the nearest integer. — toskv, Aug 22 '15 at 18:11

score 3 · Accepted Answer · answered Aug 22 '15 at 18:14

3

Use Math.floor to round down.

var round = function (num) {
   return Math.floor(num * 2) / 2;
};

console.log(round(3));  // 3
console.log(round(3.4));  // 3
console.log(round(3.5));  // 3.5
console.log(round(3.6));  // 3.5
console.log(round(4));  // 4

answered Aug 22 '15 at 18:14

reergymerej

2,371
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1

thank you so much its solve my problem :) – Azad Chouhan Aug 22 '15 at 18:17

score 0 · Answer 2 · answered Aug 22 '15 at 18:14

0

This should truncate to the nearest .5:

parseInt(x * 2) / 2;

answered Aug 22 '15 at 18:14

ryachza

4,460
18
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How to round figure if it is less then point 5 only in javascript

2 Answers2