Lecture 6.3 | Flowchart | 9th Class Computer Science | Chapter 6: Introduction to Problem Solving скачать в хорошем качестве

Lecture 6.3 | Flowchart | 9th Class Computer Science | Chapter 6: Introduction to Problem Solving

🧠 1. What is a Flowchart? A flowchart is a graphical representation of a process or algorithm, showing the sequence of steps needed to solve a problem. It uses symbols, arrows, and connectors to visualize the flow of logic. 💡 In simple words: A flowchart converts your thinking into a visual step-by-step diagram. ⚙️ 2. Why Do We Use Flowcharts? Flowcharts make complex logic easy to understand and communicate. They are widely used in: Problem solving Algorithm design Software development Business process modeling Debugging and documentation ✅ 3. Advantages / Benefits of Flowcharts Clarity: Shows each step clearly. Easy Debugging: Errors in logic can be found visually. Better Communication: Helps explain logic to others (students, developers, or clients). Documentation: Acts as a permanent reference of program logic. Planning Tool: Helps design before coding. Efficiency: Saves time during coding and testing. 🔣 4. Common Flowchart Symbols Symbol Name Description 🔷 Oval (Terminator) Start / End Marks the beginning and end of a flowchart ⬜ Rectangle (Process) Processing Step Represents an operation or action (e.g., calculation) 🔶 Parallelogram Input / Output Used for reading input or displaying output 🔺 Diamond (Decision) Condition / Choice Represents a yes/no or true/false decision ⬣ Arrow Lines Flow Direction Show the order of execution between steps ⏺ Connector Circle Connector Used when flowchart continues to another page or area 🧩 5. Rules for Drawing a Flowchart Always start with a Start symbol and end with End. Flow should move top to bottom or left to right. Use arrows to indicate direction clearly. Every decision should have two paths (Yes/No or True/False). Keep symbols aligned and neatly spaced. Label inputs, processes, and decisions meaningfully. 💻 6. Example Scenario – Drawing a Flowchart 🔹 Problem: “Write a flowchart to check whether a number is even or odd.” 🔹 Steps: Start Input a number (N) Check: Is N mod 2 = 0? If Yes → Display ‘Even’ If No → Display ‘Odd’ End 🔹 Flowchart Structure: [Start] ↓ [Input N] ↓ [N mod 2 = 0 ?] ↙Yes ↘No [Even] [Odd] ↓ [End] This example visually demonstrates how a decision (diamond) divides the logic into two possible outcomes. 🧠 7. Real-Life Examples of Flowcharts ATM cash withdrawal process Online registration form logic Student grade calculation system Library fine calculation Simple calculator algorithm 🎓 Instructor: Muhammad Arfan Wazeer PhD Scholar (Computer Science) | Data Science Researcher | Administrator – KIMS College Kamir 🔗 Watch the Complete 9th Class Computer Science Playlist: 🎬 Watch All Lectures