feat: add operation

giovanni-guidini · giovanni-guidini · commit e614be2f64ff · 2026-06-15T17:13:43.000+02:00
diff --git a/app/calculator.py b/app/calculator.py
@@ -14,3 +14,6 @@ def divide(x, y):
             return 'Cannot divide by 0'
         return x * 1.0 / y
 
+    def foo(x):
+        return -x
+
