The correct spelling of my username is "7eleven". Spelling it "7/11", like the store, would generally be the same thing as using "to" where you should be using "too".
Example of Incorrect Usage:No. Because that's not my name, and I hate you.Hey, 7-11! Can you check this app for me?
Example of Correct Usage:Yes, because you used my name correctly and I love you.Hey, 7eleven! Can you check this app for me?
I understand that we're all lazy, and might not want to type out the full name. If you happen to be the type of person that likes to shorten my name, "7" is acceptable.
Example of Correct Abbreviated Usage:Yes, because you abbreviated my name correctly, and I love you.Hey, 7! Can you check this app for me?
If you have any questions, or need help grasping the concept, feel free to tell me, and I'll try my hardest to set things straight.