[Term Entry] Python keywords: pass

content/python/concepts/keywords/terms/pass/pass.md

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+---
+Title: 'pass'
+Description: 'Acts as a placeholder in Python code, allowing empty code blocks (like functions or loops) to run without causing errors.'
+Subjects:
+  - 'Computer Science'
+  - 'Data Science'
+Tags:
+  - 'Arguments'
+  - 'Functions'
+  - 'Parameters'
+  - 'Python'
+CatalogContent:
+  - 'learn-python-3'
+  - 'paths/computer-science'
+---
+
+The **`pass`** keyword in Python acts as a placeholder in code blocks where no action is required. It prevents syntax errors when a statement is needed but no operation should occur.
+
+## Syntax
+
+```pseudo
+def function_name():
+  pass
+```
+
+The `pass` statement is written in lowercase and is often used inside a [function](https://www.codecademy.com/resources/docs/python/functions), [class](https://www.codecademy.com/resources/docs/python/classes), [loop](https://www.codecademy.com/resources/docs/python/loops), or [conditional](https://www.codecademy.com/resources/docs/python/conditionals) block.
+
+> **Note:** Using incorrect casing like `Pass` or `PASS` will result in a `SyntaxError`.
+
+## Example 1
+
+In this example, the `sum()` function is defined but its logic is not yet implemented:
+
+```py
+def sum(a, b):
+  pass  # actual logic is yet to be implemented
+
+print(sum(5,6))
+```
+
+When called, this function returns `None` because no return statement is defined.
+
+## Codebyte Example
+
+In real projects, developers use `pass` as a temporary placeholder in unfinished functions to keep the program running without errors:
+
+```codebyte/python
+# Example: Placeholder for a future login verification function
+
+def verify_login(username, password):
+  pass  # Logic will be added later to check user credentials
+
+print("Login system is under construction...")
+verify_login("Alice", "mypassword")
+```