Answer:
It saves the position of the first occurrence of "o" to variable something.
Step-by-step explanation:
The search() method in javascript searches the expression or the string and returns the position of it's first occurrence and if not found it returns -1.
So in the code given above it will search for character o and returns the position of it's first occurrence that is 16 and if there were no o in the string then it would have returned -1.