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C#: for

Handbook C# · Practical Guide

A loop with an initial action, a condition, and an action after each iteration.

Simple example (Example.cs)

Save this example separately as Example.cs. Run it independently of the other examples on this page.

Example.cs:

// PROJECT-EXAMPLE
for (int i = 0; i < 3; i++)
    System.Console.WriteLine(i);

Result:

0
1
2

Syntax

for (int i = 0; i < count; i++) { ... }

Example 1: simple form

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        for (int i = 0; i < 3; i++) Console.WriteLine(i);
    }
}

Example 2: another practical form

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        int[] values = [4, 8, 12];
        for (int i = values.Length - 1; i >= 0; i--) Console.WriteLine(values[i]);
    }
}

Official source: Microsoft Learn.