First conditional

THE FIRST CONDITIONAL

The first conditional has the present simple after 'if', then the future simple in the other clause: 

If + present simple (CONDITION), will + infinitive (MAIN CLAUSE). 

It's used to talk about things that might happen in the future. Of course, we can't know what will happen in the future, but this describes possible things, which could easily come true. 

Here are some more examples:

If it rains, I won't go to the park. 

If I study today, I will go to the party tonight.

If I have enough money, I will buy some new shoes.

She will be late if the train is delayed.

She will miss the bus if she doesn't leave soon.

If I see her, I'll tell her.

First vs. Zero Conditional: The first conditional describes a particular situation, whereas the zero conditional describes what happens in general. 

For example (zero conditional): if you sit in the sun, you get burned (here I'm talking about every time a person sits in the sun - the burning is a natural consequence of the sitting) 

But (first conditional): if you sit in the sun, you'll get burned (here I'm talking about what will happen today, another day might be different)

(http://www.perfect-english-grammar.com/conditionals.html)