If I delete photos from my MacBook, will it delete them from iCloud?

Hello,

I have been using iPhone for years, but I just bought my first MacBook Air. It seems it downloaded all the photos from iCloud to my MacBook for some reason so now my MacBook is almost full. I don't want my iCloud photos on my MacBook, so I turned photos off in the iCloud sections of my MacBook, but the photos are still on the MacBook it seems. If I delete them from my MacBook, will it delete them from my iPhone/iCloud account?

Please help,

Thanks