How do I find out what I.P address to give to a Socket?

[eLancaster]

I've just started learning about Servers and Sockets.
I made a client program which I run in one cmd window (on Windows 7)
and I made a server program which I run on another cmd window.

How do I find out what I.P address to give to my client program? I really don't know much about servers so please keep it simple. I do know how to use a command line.

[eLancaster]

My server has a local host address of I.P is 0.0.0.0/0.0.0.0.
I've given the client an I.P of 12.12.12.12
The connection always times out.

[Norm]

If both programs are on the same machine, then use the localhost address: 127.0.0.1
The client would use the localhost address to connect to a server on the same machine.

[eLancaster]

Totally worked. So for any PC in the whole entire world, the address of the computer you're working on is 127.0.0.1 (irrespective of Operating System)?

[Norm]

I think that is supposed to be the standard, but I don't know for sure. I've only worked on Windows and Ubuntu. I think it also works on Macs

[eLancaster]

I see. One more question : how can i access my server from my browser? Is that even possible?

[Norm]

Yes you can. I do it all the time with my test server. Enter a location of:
http://127.0.0.1:<porthere>

Where <porthere> is the port number the server is listening on. Default is 80. So if you're using the default:
http://127.0.0.1

[kjkrum]

So for any PC in the whole entire world, the address of the computer you're working on is 127.0.0.1 (irrespective of Operating System)?

The IPv4 loopback is 127/8 (127-dot-anything). The IPv6 loopback is ::1 (0:0:0:0:0:0:0:1). Your hosts file probably contains an entry for "localhost" that maps to one of these. So, for example, you could use the URL "http://localhost" (optionally with a port number) to connect to a HTTP server on your own computer.