Great move buh I don’t agree to this ,what if she’s a total stranger you met somewhere for the very first time?? How are you gonna meet her again ??
Learn to talk to girls without asking for their number. Have a good conversation, be playful and nice. When you’re done, wish her a nice day and go your way.
If you guys eventually meet again, she’ll be more than willing to give you her number because she knows you’re not desperate.
That’s called playing the long game.