Add algorithm to compute absolute age difference

Author: Ommodi07

maths/age_difference.py

@@ -0,0 +1,38 @@
+"""
+Algorithm to calculate the absolute age difference between two people.
+
+Wikipedia: https://en.wikipedia.org/wiki/Chronological_age
+"""
+
+
+def age_difference(boy_age: int, girl_age: int) -> int:
+    """
+    Return the absolute age difference between two people.
+
+    The function raises a ValueError if any of the ages is negative.
+
+    >>> age_difference(22, 20)
+    2
+    >>> age_difference(20, 22)
+    2
+    >>> age_difference(30, 30)
+    0
+    >>> age_difference(-1, 5)
+    Traceback (most recent call last):
+        ...
+    ValueError: Age cannot be negative.
+    >>> age_difference(18, -2)
+    Traceback (most recent call last):
+        ...
+    ValueError: Age cannot be negative.
+    """
+    if boy_age < 0 or girl_age < 0:
+        raise ValueError("Age cannot be negative.")
+    return abs(boy_age - girl_age)
+
+
+if __name__ == "__main__":
+    # Example usage (not required by TheAlgorithms, but for local testing)
+    print(age_difference(22, 20))  # 2
+    print(age_difference(20, 22))  # 2
+    print(age_difference(30, 30))  # 0