Processing.org’s reference page on ‘While’ loops says:
“Controls a sequence of repetitions. The while structure executes a series of statements continuously while the expression is true. The expression must be updated during the repetitions or the program will never “break out” of while.”
The computer is basically always going to execute whatever is in the ‘while’ while that thing is true, for example:
‘while’ the number of circles is more than 0, the float, fill and ellipse commands will always execute, until the loop is broken by the ‘numberOfCircles’ function that maxes out the circles at 1o.