feat(boolean_algebra): add half adder implementation

Author: Ranjita1708

boolean_algebra/half_adder.py

@@ -16,10 +16,17 @@
 """
 
 
-def half_adder(a: int, b: int) -> tuple[int, int]:
+def half_adder(input_a: int, input_b: int) -> tuple[int, int]:
     """
     Compute the sum and carry for a Half Adder.
 
+    Args:
+        input_a: First input bit (0 or 1).
+        input_b: Second input bit (0 or 1).
+
+    Returns:
+        A tuple `(sum_bit, carry_bit)`.
+
     >>> half_adder(0, 0)
     (0, 0)
     >>> half_adder(0, 1)
@@ -32,15 +39,15 @@ def half_adder(a: int, b: int) -> tuple[int, int]:
     Raises:
         ValueError: If inputs are not 0 or 1.
     """
-    if a not in (0, 1) or b not in (0, 1):
+    if input_a not in (0, 1) or input_b not in (0, 1):
         raise ValueError("Inputs must be 0 or 1")
 
-    sum_bit = a ^ b
-    carry_bit = a & b
+    sum_bit = input_a ^ input_b
+    carry_bit = input_a & input_b
     return sum_bit, carry_bit
 
 
 if __name__ == "__main__":
     import doctest
 
-    doctest.testmod()
+    doctest.testmod()