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Summer 2006- Questions on Recursion

Questions?
def reverse (string):
 if string == " ":
  return " "
 return reverse (string [1:]) + string [0]


You need to check for an empty string. if string == "": There should be no space in between. You also need to fix the indentation. After that, it'll work. - Bobby Mathew
def decreaseRed(alist):
 if alist == []:
  return
 setRed(alist[0], getRed(alist[0]*.8)
 decreaseRed(alist[1:])

You need a closing ')' after the setRed statement. That should work provided the input is getPixels(picture). - Bobby Mathew
def findlength (string):
 if string == " ":
  return 0
 return len(string)

That's right, apart from the indentation. - Bobby Mathew


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