What is Code Completion?
TL;DR
An AI feature that predicts and auto-completes code as programmers type. Dramatically improves development efficiency.
Code Completion: Definition & Explanation
Code completion is a feature where AI predicts and suggests the next code a programmer should write. Beyond variable and function name completion, it can generate entire functions from comments and propose multi-line code blocks by learning existing code patterns. GitHub Copilot popularized LLM-based code completion, followed by Cursor, Tabnine, Windsurf, and Amazon Q Developer. The mainstream approach is inline suggestions accepted with a single Tab key press, supporting major programming languages including Python, JavaScript, TypeScript, Go, and Rust.