In general, for loops are used when you know exactly how many times you plan to run a loop; a while loop is used when the number of iterations is uncertain. Conditional Statement Basic Structure: if ...

Duke University. "Emotional Memories Function In Self-Reinforcing Loop." ScienceDaily. ScienceDaily, 24 March 2005. <www.sciencedaily.com / releases / 2005 / 03 / 050323130625.htm>.