IOS 7. If I delete my apps, will I be able to redownload them?

Ok so as you all know the iPhone has an update, iOS 7.It needs 3.1GB to download but I only have 1.3GB of storage. It's asking me to delete some things so that the phone can update. My question is, if I delete my apps will I be able to redownload them once the update is finish? I don't know how to put this but like Is the 3.1GB JUST for the update ONLY (3.1 dissappears after update is done) or is that just space I need to be able to update? Hope I didn't confuse anyone.

You can get them back. The 3.1 is just temporary for the update.

Yes you will, you will just have to go to the App Store, find the apps you had and then redownload them

Yes. It is possible