expression
how about ...?; what do you think?
Used to solicit an opinion or suggestion, often with a tentative or inviting tone.
明日の会議、どうかな？
How about tomorrow's meeting? What do you think?
expression
I wonder; I'm not sure
Expresses uncertainty or doubt about a situation; often used when the speaker is pondering something.
彼は来るかな？どうかな…
Will he come? I wonder...