CODEWITHSUNDEEP
c#repeat
Nathan Campos
Nathan Campos

Reputation: 29507

Repeat Forever a If Function

I'm developing a simple project, but how I can do a repeat forever a If function(It's like a command-line)? Thanks.

My code is like this:

Console.Write("> ");
var Command = Console.ReadLine();
if (Command == "About") {
    Console.WriteLine("This Operational System was build with Cosmos using C#");
    Console.WriteLine("Emerald OS v0.01");
}

Upvotes: 2

Views: 4579

Answers (7)

Artelius
Artelius

Reputation: 49099

You mean this?

while(true) {
    if( ...) {
    }
}

PS: this is one of my favourite preprocessor hacks. Doesn't work in C# though, only C/C++.

#define ever (;;)

for ever {
    //do stuff
}

Upvotes: 2

Catchwa
Catchwa

Reputation: 5855

You can't use an 'if' statement by itself because when it gets to the end your program will continue executing the next statement in your code. I think what you're after is a 'while' statement that always evaluates to true.

e.g.

string Command; 
while(true)
{
    Command = Console.ReadLine(); 
    if (Command == "About")
    { 
        Console.WriteLine("This Operational System was build with Cosmos using C#"); 
        Console.WriteLine("Emerald OS v0.01");
    }
}

This loop will be inescapable unless an exception is thrown or you execute a break statement (or whatever the equivalent is in C#, I'm a Java guy - don't hate me).

Upvotes: 1

Tom Neyland
Tom Neyland

Reputation: 6968

By any chance do you mean:

while( !(!(!(( (true != false) && (false != true) ) || ( (true == true) || (false == false) )))) == false   )
   {
       Console.Write("> ");
       if ("About" == Console.ReadLine())
       {
           Console.WriteLine("This Operational System was build with Cosmos using C#");
           Console.WriteLine("Emerald OS v0.01");
       }
   }

Upvotes: 9

Noldorin
Noldorin

Reputation: 147401

I think you just want a simple while loop with (at least) one exit point.

while(true)
{
    Console.Write("> ");
    var command = Console.ReadLine();
    if (command == "about") {
        Console.WriteLine("This Operational System was build with Cosmos using C#");
        Console.WriteLine("Emerald OS v0.01");
    } else if (command == "exit") {
        break; // Exit loop
    }
}

Upvotes: 1

SLaks
SLaks

Reputation: 887777

Your question is unclear, but you probably want to do something like this:

while(true) {    //Loop forever
    string command = Console.ReadLine();
    if (command.Equals("Exit", StringComparison.OrdinalIgnoreCase))
        break;    //Get out of the infinite loop
    else if (command.Equals("About", StringComparison.OrdinalIgnoreCase)) {A
        Console.WriteLine("This Operational System was build with Cosmos using C#");
        Console.WriteLine("Emerald OS v0.01");
    }

    //...
}

Upvotes: 3

John La Rooy
John La Rooy

Reputation: 304355

string Command;
while (true) {
  Command = Console.ReadLine();
  if (Command == "About") {
    Console.WriteLine("This Operational System was build with Cosmos using C#");
    Console.WriteLine("Emerald OS v0.01");
  }
}

Upvotes: 4

Martin Clarke
Martin Clarke

Reputation: 5657

I don't think your question is really clear. But here is an attempt :)

while (true) {
   if (i ==j ) {
     // whatever
   }
}

Upvotes: 2

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