Use this kind of sentence to talk about what the result of an action will be. Say this when you're sure or pretty sure what the result will be. It's usually used when you have experience with something. For example:
If you cook it for too long, it'll turn out tough.
If you press this button, the whole thing will turn off.
When you don't have experience with the results, it's common to use "probably" or a phrase like "I'm sure that ___":
If you search online, I'm sure that you'll find some nice houses in that price range.
If you ask Brian, I bet he'll give you a few good recommendations.