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C# | Padding an integer number with leading zeros

C# | String.Format() method example: Here, we are going to learn how to pad an integer number with leading zero in C#?
Submitted by IncludeHelp, on November 01, 2019

To pad an integer number with leading zero, we can use String.Format() method which is library method of String class in C#.

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Demo for pad zeros before an integer number:");

            Console.WriteLine(String.Format("{0:000000}", 256));
            Console.WriteLine(String.Format("{0:000000}", -256));          

            Console.WriteLine();  
        }
    }
}

Output

Demo for pad zeros before an integer number:
000256
-000256

In the above program, we are printing 256 and -256 numbers in 6 digits, as we know that 256 has 3 digits and we are padding (left/leading) them with zeros.

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