1FahadShakeel

function format(input) {
    // input.value = (input.value).toLocaleString('en-US');
    var nStr = input.value + "";
    nStr = nStr.replace(/\,/g, "");
    x = nStr.split(".");
    x1 = x[0];
    x2 = x.length > 1 ? "." + x[1] : "";
    var rgx = /(\d+)(\d{3})/;
    while (rgx.test(x1)) {
        x1 = x1.replace(rgx, "$1" + "," + "$2");

1FahadShakeel

     let princ = 10000; // start deposit
    let add = 500; // monthly deposit (need plus it every year)
    let rate = 0.06; // interest rate divided to create decimal
    let months = (41 * 12); //41 years of monthly contributions
    for (let i = 1; i <= months; i++) {

        princ += princ * (rate / 12);
        princ += add;
        console.log(princ);
    }

1FahadShakeel

/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Firefox */
input[type=number] {
  -moz-appearance: textfield;

1FahadShakeel

function pmt(rate, nper, pv) {
    if (rate == 0) return -(pv) / nper;

    var pvif = Math.pow(1 + rate, nper);
    var PMT = rate / (pvif - 1) * -(pv * pvif);
    return PMT;
}

1FahadShakeel

var RATE = function(nper, pmt, pv, fv, type, guess) {
    // Sets default values for missing parameters
    fv = typeof fv !== 'undefined' ? fv : 0;
    type = typeof type !== 'undefined' ? type : 0;
    guess = typeof guess !== 'undefined' ? guess : 0.1;

    // Sets the limits for possible guesses to any
    // number between 0% and 100%
    var lowLimit = 0;
    var highLimit = 1;