How do I write a method that accepts a variable number of parameters?
C# offers an elegant solution to this problem through parameter arrays. A parameter array is a single-dimensional array included as the last parameter in the parameter list of a method:
public static string Sum(string separator, paramsint[] numbers)
{
string result = "";
for (int i = 0; i < numbers.Length; i++)
{
if (i > 0)
result += separator;
result += numbers[i].ToString();
}
return result;
}
Such a function can be called in two different ways:
int[] numbers = { 1, 2, 3, 4 };
Console.WriteLine(Sum("+", numbers) + "=" + (int)(1 + 2 + 3 + 4));
Console.WriteLine(Sum("+", 1, 2, 3, 4) + "=" + (int)(1 + 2 + 3 + 4));
Posted on May 12, 2008 by Viktar Karpach
