Create utils.py

src/utils.py

@@ -0,0 +1,26 @@
+def plural(value, singular, plural):
+    """
+    Return the correct singular or plural word.
+    """
+    return singular if value == 1 else plural
+
+
+def format_result(result):
+    """
+    Convert the comparison result into a readable sentence.
+    """
+
+    if result["same_age"]:
+        return (
+            f"Hello, {result['name']}!\n\n"
+            f"You and {result['other_name']} are exactly the same age. 🎉"
+        )
+
+    return (
+        f"Hello, {result['name']}!\n\n"
+        f"You're "
+        f"{result['years']} {plural(result['years'], 'year', 'years')}, "
+        f"{result['months']} {plural(result['months'], 'month', 'months')}, and "
+        f"{result['days']} {plural(result['days'], 'day', 'days')} "
+        f"{result['relation']} than {result['other_name']}. 🎉"
+    )