How to parse float with two decimal places in javascript?

Question

I have the following code. I would like to have it such that if price_result equals an integer, let\'s say 10, then I would like to add two decimal places. So 10 would be 10

Answer 1

Simple JavaScript, string to float:

var it_price = chief_double($("#ContentPlaceHolder1_txt_it_price").val());

function chief_double(num){
    var n = parseFloat(num);
    if (isNaN(n)) {
        return "0";
    }
    else {
        return parseFloat(num);
    }
}

Answer 2

@sd Short Answer: There is no way in JS to have Number datatype value with trailing zeros after a decimal.

Long Answer: Its the property of toFixed or toPrecision function of JavaScript, to return the String. The reason for this is that the Number datatype cannot have value like a = 2.00, it will always remove the trailing zeros after the decimal, This is the inbuilt property of Number Datatype. So to achieve the above in JS we have 2 options

1. Either use data as a string or
2. Agree to have truncated value with case '0' at the end ex 2.50 -> 2.5.

Answer 3

If your objective is to parse, and your input might be a literal, then you'd expect a float and toFixed won't provide that, so here are two simple functions to provide this:

function parseFloat2Decimals(value) {
    return parseFloat(parseFloat(value).toFixed(2));
}

function parseFloat2Decimals(value,decimalPlaces) {
    return parseFloat(parseFloat(value).toFixed(decimalPlaces));
}

Answer 4

When you use toFixed, it always returns the value as a string. This sometimes complicates the code. To avoid that, you can make an alternative method for Number.

Number.prototype.round = function(p) {
  p = p || 10;
  return parseFloat( this.toFixed(p) );
};

and use:

var n = 22 / 7; // 3.142857142857143
n.round(3); // 3.143

or simply:

(22/7).round(3); // 3.143

Answer 5

Please use below function if you don't want to round off.

function ConvertToDecimal(num) {
    num = num.toString(); //If it's not already a String
    num = num.slice(0, (num.indexOf(".")) + 3); //With 3 exposing the hundredths place
   alert('M : ' +  Number(num)); //If you need it back as a Number    
}

Answer 6

To return a number, add another layer of parentheses. Keeps it clean.

var twoPlacedFloat = parseFloat((10.02745).toFixed(2));