Question

How to pad a number with starting zero in C#

Answer 1

using System;

class Program {
    static void Main() {
        int number = 892;
        string paddedNumber = number.ToString().PadLeft(4, '0');

        Console.WriteLine(paddedNumber);
    }
}



/*
run:

0892

*/

 

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Answer 2

using System;

class Program {
    static void Main() {
        int number = 892;
        string paddedNumber = number.ToString("D4");

        Console.WriteLine(paddedNumber);
    }
}



/*
run:

0892

*/

 

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Answer 3

using System;

class Program {
    static void Main() {
        int number = 3;
        string paddedNumber = number.ToString("00");

        Console.WriteLine(paddedNumber);
    }
}



/*
run:

03

*/

 

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Answer 4

using System;

class Program {
    static void Main() {
        int number = 3;
        string str = string.Format("{0:00} hours remaining", number);

        Console.WriteLine(str);
    }
}



/*
run:

03 hours remaining

*/

 

70+ SQL courses for beginners and professionals