Built-in data types in C++ - Mini Project: Build & Apply

Understanding Built-in Data Types in C++

📖 Scenario: You are learning how to use basic built-in data types in C++. These types help you store different kinds of information like numbers and letters.

🎯 Goal: You will create variables of different built-in data types, assign values to them, and then print their values to see how they work.

📋 What You'll Learn

Create variables of type int, double, char, and bool with exact names and values.

Create a variable called isAdult of type bool and assign it a value.

Use std::cout to print the values of all variables in the specified order.

💡 Why This Matters

🌍 Real World

Built-in data types are the foundation for storing and working with data in any C++ program, from games to business software.

💼 Career

Understanding data types is essential for programming jobs because it helps you manage memory and data correctly and avoid errors.

1

Create variables of built-in data types

Create an int variable called age and set it to 25. Create a double variable called height and set it to 175.5.

C++

#include 

int main() {
    // Create an int variable called age and set it to 25
    // Create a double variable called height and set it to 175.5
    // Your code here

    return 0;
}

Need a hint?

Use the syntax type variableName = value; to create variables.

2

Add char and bool variables

Create a char variable called initial and set it to 'A'. Create a bool variable called isAdult and set it to true.

C++

#include 

int main() {
    int age = 25;
    double height = 175.5;
    // Create a char variable called initial and set it to 'A'
    // Create a bool variable called isAdult and set it to true
    // Your code here

    return 0;
}

Need a hint?

Remember to use single quotes for char values and true or false for bool.

3

Print all variable values

Use std::cout to print the values of age, height, initial, and isAdult each on a new line.

C++

#include 

int main() {
    int age = 25;
    double height = 175.5;
    char initial = 'A';
    bool isAdult = true;
    // Print age, height, initial, and isAdult each on a new line
    // Your code here

    return 0;
}

Need a hint?

Use std::cout << variable << std::endl; to print each variable on its own line.

4

Run and check the output

Run the program and check that the output shows the values 25, 175.5, A, and 1 each on a new line.

C++

#include 

int main() {
    int age = 25;
    double height = 175.5;
    char initial = 'A';
    bool isAdult = true;

    std::cout << age << std::endl;
    std::cout << height << std::endl;
    std::cout << initial << std::endl;
    std::cout << isAdult << std::endl;

    // Check the output
}

Need a hint?

The bool value true prints as 1 in C++.