Reading in lines of arbitrary length

Walking through memory allocation when reading in a string of arbitrary length just to make sure I understand the concept. Currently learning C and handcoding (no ai coding) to build my programming knowledge / skills. Previous: How much c ive learned in 7 days    • Learning C - how much c ive covered in 7(i...   Playlist: learn c no ai coding    • Learn C, no ai coding   Chapters: 0:00 Introduction to Dynamic Memory Allocation in C 1:34 Variables and Memory Setup in readline() 3:52 How Loops Process Data from Files 8:59 Resizing Buffers with realloc() in C 12:23 Handling String Terminators and Memory Management 17:52 Implementing readline() and Final Review working through Beej's guide to programming in C. Going to work through documentation and basics, hopefully then onto advent of code, and then some projects... websocket and on to an interpreter for a final sort of large project.