🎥 Lecture 2: Variable, Data Types & Operators

Series: DSA Series by Apna college | Language: C++

🚀 What You'll Learn

• Basics of C++ programming: Variables, data types, operators, and output statements.
• How to set up your coding environment using Visual Studio Code.
• Key concepts like case sensitivity, namespaces, and writing the first C++ program.

📝 Key Highlights

1️⃣ Starting with Variables, Data Types & Operators

• Variables: Named storage for data that can change during program execution.
  • Timestamp: What are Variables?
  • Example: int age = 25; stores the value 25 in the variable age.
• Data Types: Define the type of data a variable can hold (e.g., int, float, char).
  • Timestamp: Introduction to Data Types
  • Example:
    • int for integers like 10.
    • float for decimal numbers like 3.14.
    • char for single characters like 'A'.
• Operators: Symbols that perform operations on variables (e.g., +, , , /).

  • Timestamp: How Operators Work

  • Example: To add two numbers, use +:

    cpp
    Copy code
    int a = 5, b = 10;
    int sum = a + b; // sum = 15
    
    

2️⃣ Setting Up Visual Studio Code (VS Code)

• Install and configure VS Code for C++ development.
  • Timestamp: Setting Up VS Code
  • Steps:
    1. Install VS Code and a C++ compiler (e.g., GCC).
    2. Create a new folder and open it in VS Code.
    3. Use #include <iostream> and using namespace std; for basic programs.
• Folder Organization:
  • Timestamp: Folder Setup in VS Code
  • Always create separate folders for different projects to keep files organized.

3️⃣ Writing Your First C++ Program

• Basic Structure:

  cpp
  Copy code
  #include <iostream>using namespace std;
  int main() {
      cout << "Hello, World!";
      return 0;
  }
  
  

  • Timestamp: Writing Your First Program
  • Key Takeaways:
    • cout: Prints output to the screen.
    • return 0;: Indicates successful program completion.
    • Use semicolons (;) to terminate statements.