What is Loop control variable in AP® Computer Science A?

Loop control variable

Also called: loop variable, counter

The variable that controls how many times a loop runs. In a for loop it is the variable set up by the initialization in the header.

Appears in the course and exam description (CED): 2.8.A.2

A loop control variable declared in a for loop header exists only inside the loop. Change it only in the update, not also in the body.

for (int i = 0; i < 3; i++) {
    System.out.print(i + " ");
}

Output:

0 1 2