What is " : " (two points) in C#?

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8

I still don’t understand what the two points represent and why this code isn’t running.

int soma = 0;
        int[] lista = { 3, 7, -6, 10, -1, 0, -1, 4};

        for (int i : lista)
        {
            if (i > 0) { 
            soma = soma + i;
            }
        }
        Console.WriteLine("Soma: " + soma);
c# for syntax
  • 2

    Hey, there you are, Misaell. It would be important to [Dit] the question with more details (which error, since it says it does not work, and complement with a brief explanation of what I expected the code to do - references are welcome) to check if it has to do with the mentioned syntax (this part has already been explained by @Maniero) or if they are two separate problems.

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1 answer

8

In this context it is syntax error. Under no circumstances can the two points be used there in C#.

In Java this syntax of for would be valid and would be equivalent to this in C#:

foreach (int i in lista)

Since there are no two points in another part of the code I imagine that is confusing languages. So until you try to compile this will give a syntax error, so it is not running. So it runs:

using static System.Console;

public class Program {
    public static void Main() {
        var soma = 0;
        foreach (var i in { 3, 7, -6, 10, -1, 0, -1, 4}) if (i > 0) soma++;
        WriteLine("Soma: " + soma);
    }
}

Behold working in the ideone. And in the .NET Fiddle. Also put on the Github for future reference.

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