Why Is the Console Window Closing Immediately Once Displayed My Output

Why is the console window closing immediately once displayed my output?

the issue here is that their Hello World Program is showing up then it would immediately close.

why is that?

Because it's finished. When console applications have completed executing and return from their main method, the associated console window automatically closes. This is expected behavior.

If you want to keep it open for debugging purposes, you'll need to instruct the computer to wait for a key press before ending the app and closing the window.

The Console.ReadLine method is one way of doing that. Adding this line to the end of your code (just before the return statement) will cause the application to wait for you to press a key before exiting.

Alternatively, you could start the application without the debugger attached by pressing Ctrl+F5 from within the Visual Studio environment, but this has the obvious disadvantage of preventing you from using the debugging features, which you probably want at your disposal when writing an application.

The best compromise is probably to call the Console.ReadLine method only when debugging the application by wrapping it in a preprocessor directive. Something like:

#if DEBUG
    Console.WriteLine("Press enter to close...");
    Console.ReadLine();
#endif

You might also want the window to stay open if an uncaught exception was thrown. To do that you can put the Console.ReadLine(); in a finally block:

#if DEBUG
    try
    {
        //...
    }
    finally
    {
        Console.WriteLine("Press enter to close...");
        Console.ReadLine();
    }
#endif

C# console .exe file opens and closes immediately after

Add Console.ReadLine(); or Console.ReadKey(); on end of the code.

Like this:

static void Main(string[] args)
{
    //code here

    Console.ReadLine();
}

Read more here: Why is the console window closing immediately once displayed my output?

How to stop C# console applications from closing automatically?

You can just compile (start debugging) your work with Ctrl+F5.

Try it. I always do it and the console shows me my results open on it. No additional code is needed.

Preventing console window from closing on Visual Studio C/C++ Console application

Starting from Visual Studio 2017 (15.9.4) there is an option:

Tools->Options->Debugging->Automatically close the console

The corresponding fragment from the Visual Studio documentation:

Automatically close the console when debugging stops:

Tells Visual Studio to close the console at the end of a debugging session.

C# console app closes itself after I run it

Just add Console.ReadKey(); after printing the value.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = 10;
            int b = 20;
            int c = a * b;

            Console.WriteLine(c);
            Console.ReadKey();
        }
    }
}

Stop console window from closing

Keeping the basic structure, just add Console.ReadLine() at the end

   resp3 = Console.ReadLine();
   if (resp3 == "tell me the curent date and time")
   {
      Console.Write(string.Format("{0:HH:mm:ss tt}", DateTime.Now));
   }
   Console.ReadLine();

This makes sure that the program pause at the end whether or not the correct input was entered.

Console window keeps closing, even after I type in other statements

It's really quite simple.

After this line of code:

Console.WriteLine("where is the frikin console");

You need to add this:

Console.ReadLine();

That should work.

The reason the console closes is because you told it to write some stuff to the screen, after it has finished writing what you told it to write it simply closes itself all in the fraction of a second. if you add Console.ReadLine, the console will wait for you to input something before closing, like pressing a key on the keyboard.

How to stop C++ console application from exiting immediately?

Edit: As Charles Bailey rightly points out in a comment below, this won't work if there are characters buffered in stdin, and there's really no good way to work around that. If you're running with a debugger attached, John Dibling's suggested solution is probably the cleanest solution to your problem.

That said, I'll leave this here and maybe someone else will find it useful. I've used it a lot as a quick hack of sorts when writing tests during development.

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At the end of your main function, you can call std::getchar();

This will get a single character from stdin, thus giving you the "press any key to continue" sort of behavior (if you actually want a "press any key" message, you'll have to print one yourself).

You need to #include <cstdio> for getchar.

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