Mastering Conditionals Overview Conditionals allow you to control the flow of a program by executing certain code only when specific conditions are met. In this guide, we cover all types of conditionals including nested conditions, and also demonstrate how to use and . JavaScript Python Notes --- --- --- No or — use and indentation. replaces . No switch in core Python Use or (Python 3.10+). Condition is in the middle in Python. truthy check Same truthiness rules mostly, but , , , are falsy. Python has no triple equals — checks value equality. For identity, use / . Basic Conditionals JavaScript Example Python Example Nested Conditionals JavaScript Example Python Example Real-World Example: Access Control JavaScript Python Summary : Conditionals help you make decisions in code. Nesting allows deeper logic.