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# Tests of Starlark recursion and while statement.
# This is a "chunked" file: each "---" effectively starts a new file.
# option:recursion
load("assert.star", "assert")
def sum(n):
r = 0
while n > 0:
r += n
n -= 1
return r
def fib(n):
if n <= 1:
return 1
return fib(n-1) + fib(n-2)
def while_break(n):
r = 0
while n > 0:
if n == 5:
break
r += n
n -= 1
return r
def while_continue(n):
r = 0
while n > 0:
if n % 2 == 0:
n -= 1
continue
r += n
n -= 1
return r
assert.eq(fib(5), 8)
assert.eq(sum(5), 5+4+3+2+1)
assert.eq(while_break(10), 40)
assert.eq(while_continue(10), 25)
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