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@section('title')
    Example: two recursive-call function
@stop

@section('content')

#    Example: two recursive-call function


```py
def chop(word):
  if len(word) > 0:
      print(word)
      chop(w[1:])  # 1st recursive call
      print('---')
      chop(w[1:] ) # 2nd recursive call
      print('*')
```

# Solution
Notes: 
+ the brown circled letters indicate which print statements produce which printed lines
+ the numbers above each function call frame indicate the order in which they are opened (1-15)
+ the function call frames 4, 5, 7, 8, 11, 12, 14 and 15 are invoked with an empty string `('')`. This makes `len(word) > 0` False, which means nothing is printed.

<img src="chop.jpg" style="max-width:800px">


@include('/labs/lab11_extra/_toc')

@stop