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Update tut1.txt

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Alexander 2015-06-16 15:58:21 +03:00
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@ -758,9 +758,13 @@ However, this cannot be done for mutually recursive procedures:
proc even(n: int): bool proc even(n: int): bool
proc odd(n: int): bool = proc odd(n: int): bool =
if n == 0:
true
n == 1 or even(n-1) n == 1 or even(n-1)
proc even(n: int): bool = proc even(n: int): bool =
if n == 1:
true
n == 0 or odd(n-1) n == 0 or odd(n-1)
Here ``odd`` depends on ``even`` and vice versa. Thus ``even`` needs to be Here ``odd`` depends on ``even`` and vice versa. Thus ``even`` needs to be