Type 0 Conditionals
We use Type 0 (Zero) conditionals to talk about:
truth, statements of fact or inevitable consequences of actions.
If it rains, I get wet.
I get wet if it rains.
Remember the present simple is used to state facts. A zero conditional is not technically a conditional. It is a way of using a conditional strucutre to describe truth.
If I see the beggar, I give him some money
Present Simple form & function
Type I Conditionals
Type II Conditionals
Type III Conditionals