diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..a00cee1
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,18 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.3.0
+    hooks:
+      - id: ruff   # Linting
+
+  - repo: https://github.com/psf/black
+    rev: stable
+    hooks:
+      - id: black  # formatting
diff --git a/src/moduleA.py b/src/moduleA.py
index 893ac19..b7f0906 100644
--- a/src/moduleA.py
+++ b/src/moduleA.py
@@ -4,3 +4,7 @@ def addition(a=1, b=2):
 
 def f(x: int, y: int) -> int:
     return x + y
+
+
+if __name__ == "__main__":
+    print(addition(5, 5))
diff --git a/tests/test_moduleA.py b/tests/test_moduleA.py
index c141bc2..42fe6cc 100644
--- a/tests/test_moduleA.py
+++ b/tests/test_moduleA.py
@@ -3,4 +3,4 @@ from src.moduleA import addition
 
 def test_a():
     assert addition() == 3
-    assert addition(5, 5) == 10
\ No newline at end of file
+    assert addition(5, 5) == 10