Edit (2021): It’s no longer necessary to format numbers by hand like this anymore. This answer was written way-back-when in the distant year of 2011 when IE was important and babel and bundlers were just a wonderful, hopeful dream. I think it would be a mistake to delete this answer; however in case you find … Read more
The short version: use formatC or sprintf. The longer version: There are several functions available for formatting numbers, including adding leading zeroes. Which one is best depends upon what other formatting you want to do. The example from the question is quite easy since all the values have the same number of digits to begin … Read more
numbers = [23.23, 0.1233, 1.0, 4.223, 9887.2] for x in numbers: print(“{:10.4f}”.format(x)) prints 23.2300 0.1233 1.0000 4.2230 9887.2000 The format specifier inside the curly braces follows the Python format string syntax. Specifically, in this case, it consists of the following parts: The empty string before the colon means “take the next provided argument to format()” … Read more
i.ToString().PadLeft(4, ‘0’) – okay, but doesn’t work for negative numbers i.ToString(“0000”); – explicit form i.ToString(“D4″); – short form format specifier $”{i:0000}”; – string interpolation (C# 6.0+)
You can use number_format(): return number_format((float)$number, 2, ‘.’, ”); Example: $foo = “105”; echo number_format((float)$foo, 2, ‘.’, ”); // Outputs -> 105.00 This function returns a string.
NOTE: Potentially outdated. ECMAScript 2017 includes String.prototype.padStart. You’ll have to convert the number to a string since numbers don’t make sense with leading zeros. Something like this: function pad(num, size) { num = num.toString(); while (num.length < size) num = “0” + num; return num; } Or, if you know you’d never be using more … Read more
Locale unaware ‘{:,}’.format(value) # For Python ≥2.7 f'{value:,}’ # For Python ≥3.6 Locale aware import locale locale.setlocale(locale.LC_ALL, ”) # Use ” for auto, or force e.g. to ‘en_US.UTF-8’ ‘{:n}’.format(value) # For Python ≥2.7 f'{value:n}’ # For Python ≥3.6 Reference Per Format Specification Mini-Language, The ‘,’ option signals the use of a comma for a thousands … Read more
(Math.round(num * 100) / 100).toFixed(2); Live Demo var num1 = “1”; document.getElementById(‘num1’).innerHTML = (Math.round(num1 * 100) / 100).toFixed(2); var num2 = “1.341”; document.getElementById(‘num2’).innerHTML = (Math.round(num2 * 100) / 100).toFixed(2); var num3 = “1.345”; document.getElementById(‘num3’).innerHTML = (Math.round(num3 * 100) / 100).toFixed(2); span { border: 1px solid #000; margin: 5px; padding: 5px; } <span id=”num1″></span> <span id=”num2″></span> … Read more
Convert a number to a hexadecimal string with: hexString = yourNumber.toString(16); And reverse the process with: yourNumber = parseInt(hexString, 16);