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The function assumes non-negative integers and does not handle negative inputs
or the case a = b = 0. Consider validating arguments or using absolute values
and documenting valid input ranges.
defgcd_recursive(a: int, b: int) ->int:
"""Calculate greatest common divisor using Euclidean algorithm with recursion."""ifb==0:
returnareturngcd_recursive(b, a%b)
Normalize input values to ensure non-negative results when given negative arguments by taking the absolute value of a and b at the start of the function.
def gcd_recursive(a: int, b: int) -> int:
"""Calculate greatest common divisor using Euclidean algorithm with recursion."""
+ a, b = abs(a), abs(b)
if b == 0:
return a
+ return gcd_recursive(b, a % b)
Suggestion importance[1-10]: 7
__
Why: Applying abs to a and b handles negative arguments and ensures the function always returns a non-negative GCD, improving correctness for edge cases.
Medium
Possible issue
Check zero-zero case
Explicitly handle the case where both a and b are zero, since gcd(0, 0) is undefined and should raise an error instead of returning a misleading value.
+if a == 0 and b == 0:+ raise ValueError("gcd undefined for a = b = 0")
if b == 0:
return a
return gcd_recursive(b, a % b)
Suggestion importance[1-10]: 5
__
Why: Adding a guard for a == 0 and b == 0 avoids silently returning 0 for an undefined GCD, though behavior depends on how gcd(0,0) is defined in this codebase.
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PR Type
Enhancement
Description
Add
gcd_recursivefunction implementationUse Euclidean algorithm for GCD
Include docstring for function clarity
File Walkthrough
code.py
Implement recursive GCD functioncodeflash/result/code.py
gcd_recursive(a, b)functionb == 0