chmod codes

I have a hard time remembering the number codes for changing permissions with chmod so I'm listing them here

0 = --- = no access
1 = --x = execute
2 = -w- = write
3 = -wx = write and execute
4 = r-- = read
5 = r-x = read and execute
6 = rw- = read and write
7 = rwx = read write execute (full access)

These were obtained from the following site, where additional information is available.