基本的控制流程概念

This segment should take about 40 minutes. It contains:

SlideDuration
if 表達式4 minutes
for 迴圈5 minutes
break 和 continue4 minutes
區塊 (block) 和範疇 (scope)5 minutes
函式3 minutes
巨集2 minutes
練習:考拉茲序列15 minutes