Force an Integer To Be At Least 2 Digits Long [closed]

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. 开发者_C百科 Closed 9 years ago.

Can someone give me code to do the following....

if the integer is 1-9 display a string 01,02,03 etc.. if 10 or over leave it as is.

string display = yourInt.ToString("00"); 

DOES NOT WORK

---

string display = yourInt.ToString("00");

---

Or, in String.Format syntax (used in Console.WriteLine, for example)

string s = String.Format("{0:00}", yourInt);

---

I don't see why .ToString("00") didn't work. This test succeeds...

[TestMethod]
public void RightPadIntegersWithZero() {
  var values = new [] { -100, -20, -1, 0, 1, 5, 10, 100, 567 };
  var expecteds = new [] { "-100", "-20", "-01", "00", "01", "05", "10", "100", "567" };

  for (var i = 0; i < values.Length; i++) {
    var value = values[i];
    var expected = expecteds[i];

    var result = value.ToString("00");
    Assert.AreEqual(expected, result);
  }
}

You must be doing something different than what your question describes

---

In any language (at least the ones i know) and integer value type will never have 2 digits length in any value below 10.

To display it with always a two digits length (as 02, 05, 12) you must convert your number to String and then padding it with 0.

Or you will evaluate it like:

String newValue = String.Format("{0:00}", yourInt);

As you see you will have to convert it to string before displaying it...

---

Your question is a bit ambiguous: display it where?

In any case, you will probably want to look at String.Format.

---

Would this do what you want?

for (int i = -20; i < 100; i++)
{
 string s = i.ToString();
 while (s.Length < 2) s = "0" + s;
 Console.WriteLine(s);
}

I realize it's a bit of a brute force approach as written here. But if it did the trick, you could optimize it with a reusable character array instead of appending the string.