// i doesn't have to be defined as i, it could be any letter or word
// i < 10 means the code will loop 10 times before it ends
// i always starts at 0 unless you define it
// i++ means it increments by 1 every loop, can be any math function
for (int i; i<10; i++){
// Your code
}
// Great website to learn cpp: http://learn.onlinegdb.com/c%2B%2B_loops