mkdir() mode_t arguments

[Umz]

I'm dealing with directories, so far I've read the contents and I wanted to move on to creating directories.

When I use mkdir() with just a pathname I get a 'too few arguments error' saying I need something for the mode_t but I don't know what to put into it, I can't find anywhere that explains it properly.

Can anyone explain mode_t permissions and give a few examples?
Much appreciated, I thank you for your assistance.

[jsmith]

It is the same parameter as the mode parameter to open() and to the chmod utility.

[Umz]

Much appreciated. I'll look that up and use it.