Pls explain this

This is a "for loop" - basically you create a loop where you want something to happen multiple times. In this case you want whatever you have in the loop to happen 3 times. In the brackets you initialise a variable (int i = 0), then you put a condition that will be evaluated at every new loop run (in this case i < 3) and then you increment i by one (i++). If you want to print "Hello" three times and use a for loop to achieve that it would work like this : for (int i = 0; i < 3; i++) { System.out.println("Hello!"); } What happens is: - i = 0; - i < 3 is evaluated as true, thus "Hello" is printed the first time - i++; - i =1; - i < 3 is evaluated as true, thus "Hello" is printed again - i++; - i = 2; - i < 3 is evaluated as true, thus "Hello" is printed again - i++; - i = 3; - i < 3 is evaluated as false, thus the loop ends here

Who taught it to you? It isn't necessary to solve this task and it will be explained in the section about loops.