How to ask for a guy's number?

You don't. Your a girl, boys always ask if there interested. That's the mans job.

If he's a rude, selfish, hypocritical, inconsiderate, condescending, stuck-up bad boy, dump him or reject him and tell other girls to avoid him!

it maybe weird , but he maybe think you're cute .

you can stand close with him and pretend to slip .

and start to talk with him ,when you get familar ,you can ask for his number .

Well what I usually do is I'll go up to the guy and say, "Excuse me, have I seen you before you look kinda familiar?" or something along the lines of that. Then introduce yourself and ask him for it. :)

start talking to him first and get his name would be a start introduce yourself and get his number

Give him your's on a slip of paper.

Just ask for it!