EN CSharp Keyword return

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C#: return

Handbook C# · Practical Guide

Terminates the current method or function; returns the result for a non-void method.

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
int Double(int value) { return value * 2; }
System.Console.WriteLine(Double(4));

Result:

8

Syntax

return; / return expression; / return ref variable;

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)
    {
        Console.WriteLine(Functions.Double(4));
    }
}
public static class Functions { public static int Double(int value) { return value * 2; } }

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)
    {
        Functions.Report("");
        Functions.Report("Ready");
    }
}
public static class Functions { public static void Report(string value) { if (value.Length == 0) return; Console.WriteLine(value); } }

Official source: Microsoft Learn.