space efficiency

Hi!
I was wondering what the most space efficient way to store strings was? Can you only put them in an array or is there something better?
Thank-you.

Well, obviously this isn't so efficient:
char String[1024] = "Hello world!";

It's a waste of 1011 bytes...

Instead use:
char String[] = "Hello world!";

or:
char* String = "Hello world!";

Or use dynamic allocation if you don't know the strings length.