for

for (int i = 0; i < 10; i++) {
        cout i << " " << i*i;
}

• The three elements of a for-loop: ``starting at''; ``as long as''; ``do this''.
• The condition (i < 10) is tested before the variable is changed (i++).
• The variable is changed after all the code inside the { } has been executed.
• Any of the three elements of the for-statement can be empty. for(;;) means an endless loop.