Variables and Data Types

Variables store data in memory. In C++, every variable has a type that tells the compiler what kind of value it holds.

• int for whole numbers
• double for decimal numbers
• char for a single character
• bool for true or false
• string for text

Common Data Types

Example

#include <iostream>
#include <string>
using namespace std;

int main()
{
    string name = "Alice";
    int age = 20;
    double score = 88.5;

    cout << "Name: " << name << endl;
    cout << "Age: " << age << endl;
    cout << "Score: " << score << endl;

    return 0;
}