Ruby File Processing: Calculating Averages and Parsing Data

Working with external data is a fundamental skill for any developer, yet parsing files and extracting metrics can be intimidating when you are starting out. This course teaches you how to confidently read text files, extract numerical values, and perform calculations like averages using Ruby. You will learn to handle data safely, manage file streams, and write clean, structured code to process information. By the end of this course, you will be able to write Ruby scripts that open files, parse lines of text, perform mathematical operations, and output structured results. What you will learn: Understand the core concepts of file input and output (I/O) in Ruby; Read and parse text files line by line using modern Ruby conventions; Convert string data into numbers and handle missing or malformed inputs; Implement loops and conditional logic to accumulate totals and counts; Calculate averages and format numerical outputs accurately; Practice writing clean, readable Ruby code with basic error handling. The course starts with essential file I/O terminology and basic concepts before guiding you through structured, text-based exercises that build your practical coding skills. This course is designed for beginners who have a basic grasp of Ruby variables and want to learn real-world data processing. No advanced programming experience is required. Start reading today to master file parsing and data calculation in Ruby.