Please please help I don’t understand this

Grade C

Explanation:

The if condition states if the score will be greater than or equal to 90 then the program will print grade = 'A', if the score will be greater than or equal to 80 then the program will print grade = 'B'.

A program checks conditions line by line until the condition is met, so when you enter 71, it goes through the first condition i.e. score >= 90, which is false because 71 is less than 90.

Then the second condition, score >= 80, which is false again because 71 is less than 90.

In the third condition, it is true that score >=70, then the program prints grade 'C'.

(because i need 20 chars)