Add .00 (toFixed) only if number has less than two decimal places

Question

I need to add zeroes, so that each number has at least two decimals, but without rounding. So for example:

5      --> 5.00
5.1    --> 5.10
5.11   --&g         


        

Answer 1

The below code provides one way to do what you want. There are others.

function addZeroes(num) {
    // Cast as number
    var num = Number(num);
    // If not a number, return 0
    if (isNaN(num)) {
        return 0;
    }
    // If there is no decimal, or the decimal is less than 2 digits, toFixed
    if (String(num).split(".").length < 2 || String(num).split(".")[1].length<=2 ){
        num = num.toFixed(2);
    }
    // Return the number
    return num;
}

console.log(addZeroes(5)); // Alerts 5.00
console.log(addZeroes(5.1)); // Alerts 5.10
console.log(addZeroes(5.11)); // Alerts 5.11
console.log(addZeroes(5.111)); // Alerts 5.111

http://jsfiddle.net/nzK4n/