ITEC 109 2014spring ibarland

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lab23-hw03-review
hw03 review

Today we reviewed hw03-soln. Overall good (those who attempted all problems). Biggest concept: when you turn a sequence of expressions into a function, the parameter is no longer (also) a top-level variable. It is a best a confusion (at worst a fundamental confusion) about how parameters work. (We also saw this with the turtle speedy, vs. naming a parameter speedy; a better paraemeter name would be “t” if it can hold any turtle that the function is given.

Also, we compared

drawSquare(pokey,10*1)
turn(6)
drawSquare(pokey,10*2)
turn(6)
drawSquare(pokey,10*3)
turn(6)
drawSquare(pokey,10*4)
turn(6)
drawSquare(pokey,10*5)
turn(6)
# …

for i in range(30):
  drawSquare(pokey,10*i)
  turn(6)

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©2014, Ian Barland, Radford University Last modified 2014.Mar.19 (Wed)

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