Writing and Appending Text Files in Python

This Block takes Python from reading files to creating and updating them. You will write fresh text with "w", preserve existing content with "a", add clean line breaks with \n, and choose the right mode for each task. You will also see what happens when a target file already exists, so replacing data is always an intentional choice.

What you will learn:

• Write strings and variable values to a text file
• Use \n to organize content across lines
• Understand when "w" creates a file or replaces its contents
• Use "a" to preserve earlier text and add new entries
• Choose between "r", "w", and "a"
• Keep file handling clear and safe with with open(...)

By the end, you will be able to save a fresh result, grow a simple log or journal, and work with text files without accidentally wiping out content you meant to keep.