What Is CPU and How Does It Work?
🧠 What Is CPU and How Does It Work? (Beginner Guide 2026) If you use a smartphone, laptop, or computer, there is one main part that controls everything. That part is called the CPU . Let’s understand in very simple words 👇 📌 What Is CPU? CPU stands for Central Processing Unit . It is known as: 🧠 The brain of the computer. The CPU processes instructions and performs calculations that allow your device to work. Without a CPU, your phone or computer cannot function. 🔍 What Does a CPU Do? The CPU: ✔ Runs apps ✔ Opens programs ✔ Processes data ✔ Performs calculations ✔ Controls system operations When you: Open YouTube Play a game Browse the internet The CPU is working in the background. ⚙ How Does a CPU Work? A CPU works in 3 main steps: 1️⃣ Fetch It gets instructions from memory (RAM). 2️⃣ Decode It understands what the instruction means. 3️⃣ Execute It performs the action (calculation or task). This process happens billions of times per second. 🏗 Main Parts of a CPU 1️⃣ ALU (Arithme...