Does the case fan blow air in or out?

[shaun88]

i cleaned my pc out for the first time and i forgot which way to screw the case fan back on, its blowing the air into my case and not out, did i screw it back on the correct way?
i'm so stupid -.-

many thanks

 

[jerry6]

Which fan ? The rear fan should be blowing air out , front fan and side fan in .

 

[shaun88]

Which fan ? The rear fan should be blowing air out , front fan and side fan in .

i was wondering about the front, thank you very much

 

[jerry6]

front blows in