Question

How to add leading zeros to negative number in C#

Answer 1

using System;
 
public class program
{
    public static string AddLeadingZerosToNegativeNumber(int num, int digits) {
        bool negative = false;

        if (num < 0) {
            num *= -1;
            negative = true;
        }

        string s = num.ToString();

        while (s.Length < digits) {
            s = "0" + s;
        }

        if (negative) {
            return "-" + s;
        }

        return s;
    }

    public static void Main(string[] args)
    {
        int num = -5;

        Console.WriteLine(AddLeadingZerosToNegativeNumber(num, 3));
    }
}


 
 
/*
run:
 
-005
 
*/

 

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Answer 2

using System;
 
public class program
{
    public static void Main(string[] args)
    {
        int num = -5;
        string str = num.ToString("000");

        Console.WriteLine(str);
    }
}


 
 
/*
run:
 
-005
 
*/

 

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