First conditional: if+present, will+infinitive

Use if + present, will + infinitive to talk about a possible future situation and its consequence.
If I miss the bus, I'll get a taxi.
She won't be angry if you tell her the secret.
What will you do if it rains?

The if clause can come first or second. I'll come if you like, or, If you like, I'll come.

!! You can also use the imperative or can.
If you miss the bus, get a taxi.
If you miss the bus, you can get a taxi.