Simple example of formatted numbers and amounts function implemented by js

This article describes the formatted numbers and amount functions implemented by js. Share it for your reference, as follows:

Format numbers, format amount:

function number_format(number, decimals, dec_point, thousands_sep) {
  /*
   * Parameter description:
   * number: the number to format
   * decimals: keep several decimals
   * dec_point: decimal point symbol
   * thousands_sep: thousand lithologies
   * */
  number = (number + '').replace(/[^0-9+-Ee.]/g, '');
  var n = !isFinite(+number) ? 0 : +number,
    prec = !isFinite(+decimals) ? 0 : (decimals),
    sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
    dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
    s = '',
    toFixedFix = function (n, prec) {
      var k = (10, prec);
      return '' + (n * k) / k;
    };
  s = (prec ? toFixedFix(n, prec) : '' + (n)).split('.');
  var re = /(-?\d+)(\d{3})/;
  while ((s[0])) {
    s[0] = s[0].replace(re, "$1" + sep + "$2");
  }
  if ((s[1] || '').length &lt; prec) {
    s[1] = s[1] || '';
    s[1] += new Array(prec - s[1].length + 1).join('0');
  }
  return (dec);
}

How to use:

var num=number_format(1234567.089, 2, ".", ",");//1,234,567.09
(num);

Another way to give up directly:

function number_format(number, decimals, dec_point, thousands_sep) {
    /*
     * Parameter description:
     * number: the number to format
     * decimals: keep several decimals
     * dec_point: decimal point symbol
     * thousands_sep: thousand lithologies
     * */
    number = (number + '').replace(/[^0-9+-Ee.]/g, '');
    var n = !isFinite(+number) ? 0 : +number,
      prec = !isFinite(+decimals) ? 0 : (decimals),
      sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
      dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
      s = '',
      toFixedFix = function (n, prec) {
        var k = (10, prec);
        return '' + (n * k) / k;
      };
    s = (prec ? toFixedFix(n, prec) : '' + (n)).split('.');
    var re = /(-?\d+)(\d{3})/;
    (s)
    while ((s[0])) {
      s[0] = s[0].replace(re, "$1" + sep + "$2");
    }
    if ((s[1] || '').length &lt; prec) {
      s[1] = s[1] || '';
      s[1] += new Array(prec - s[1].length + 1).join('0');
    }
    return (dec);
}
var num=number_format(1234567.089, 2, ".", ",");//1,234,567.08
(num)

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For more information about JavaScript, readers who are interested in reading this site's special topic:Summary of JavaScript mathematical operations usage》、《Summary of JavaScript data structure and algorithm techniques》、《Summary of JavaScript array operation skills》、《Summary of JavaScript sorting algorithm》、《JavaScript traversal algorithm and skills summary》、《Summary of JavaScript search algorithm skills"and"Summary of JavaScript Errors and Debugging Skills》

I hope this article will be helpful to everyone's JavaScript programming.