Append string without hard coded value

user_3793448 0
Viewed 146

I have a string which looks like:

A5050MM

What I am trying to achieve is to append the end of the string so it becomes: 

A5050MM01
A5050MM02
...

Currently I am doing this as follows:

string sn = "A5050MM";

for (int i = 0; i <= 99; i++)
{
   string appendVal = i < 10 ? "0" + i : i.ToString();
   string finalsn = string.Concat(sn, appendVal);
   Console.WriteLine(finalsn);
}

This works but as you can see I am hardcoding the "0" because if I don't then the output will be A5050MM1, A5050MM2 ... until 9.

My question is there another way to achieve this without hard coding the "0" or is this the only approach I will have to follow?

Thanks in advance for your help.

string .net c#
5 Answers

Try using formatting (Note d2 format string - at least 2 digits):

 for (int i = 0; i <= 99; i++)
 {
     // sn followed by i which has at least 2 digits 
     string finalsn = $"{sn}{i:d2}";
     Console.WriteLine(finalsn);
 }
user_23194070

You can use the overload of ToString that takes a format:

string sn = "A5050MM";

for (int i = 0; i <= 99; i++)
{
   string finalsn = string.Concat(sn, i.ToString("00"));
   Console.WriteLine(finalsn);
}

See a live demo on rextester.

user_30945330

you can use also the D2 in toString liek

        string sn = "A5050MM";

        for (int i = 0; i <= 99; i++)
        {
           string finalsn = string.Concat(sn, i.ToString("D2"));
           Console.WriteLine(finalsn);
        }
user_8487230

You can use PadLeft function

    string sn = "A5050MM";
    for (int i = 0; i <= 99; i++)
    {
        string finalsn = sn + i.ToString().PadLeft(2, '0');
        Console.WriteLine(finalsn);
    }
user_28605190 
Enumerable.Range(0, 99)
    .Select(x => String.Format("A5050MM{0:d2}", x))
    .ToList()
    .ForEach(x => Console.WriteLine(x));
user_10772790
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