Problem with Melexis contactless infrared sensor-MLX90614 and 5V buzzer code

The IDE is jam-packed with example code.

The snippet I quoted has ten characters in it.

That's too many.

It's a conditional, so you need an "if". That stays.

Then a space. That's optional; it can stay.

You need parentheses to contain the condition. They stay.

You need a condition inside the parentheses. That stays.

Which just leaves . . ? That goes.