Basic data types - Mini Project: Build & Apply

Basic Data Types in C

📖 Scenario: You are creating a simple program to store and display information about a product in a store.

🎯 Goal: Build a C program that declares variables of different basic data types, assigns values, and prints them.

📋 What You'll Learn

Declare variables of type int, float, char, and char[]

Assign specific values to each variable

Print the values using printf

💡 Why This Matters

🌍 Real World

Basic data types are the foundation for storing and managing data in any C program, such as inventory systems or calculators.

💼 Career

Understanding data types is essential for software development, embedded systems programming, and any technical job involving C language.

1

Declare variables with initial values

Declare an int variable called product_id and set it to 101. Declare a float variable called price and set it to 29.99.

C

#include 

int main() {
    // Declare int product_id and float price with given values
    // Your code here

    return 0;
}

Need a hint?

Use int for whole numbers and float for decimal numbers.

2

Add character variables

Declare a char variable called category and set it to 'A'. Declare a char array called name with the value "Pen".

C

#include 

int main() {
    int product_id = 101;
    float price = 29.99f;
    // Declare char category and char array name with given values
    // Your code here

    return 0;
}

Need a hint?

Use single quotes for char and double quotes for char arrays (strings).

3

Print all variables

Use printf to print product_id, price, category, and name each on a new line with labels.

C

#include 

int main() {
    int product_id = 101;
    float price = 29.99f;
    char category = 'A';
    char name[] = "Pen";

    // Print all variables with labels
    // Your code here

    return 0;
}

Need a hint?

Use %d for int, %.2f for float with 2 decimals, %c for char, and %s for strings.

4

Run and check output

Run the program and ensure the output matches exactly: Product ID: 101 Price: 29.99 Category: A Name: Pen

C

#include 

int main() {
    int product_id = 101;
    float price = 29.99f;
    char category = 'A';
    char name[] = "Pen";

    printf("Product ID: %d\n", product_id);
    printf("Price: %.2f\n", price);
    printf("Category: %c\n", category);
    printf("Name: %s\n", name);

    // Run and check output
    // Your code here

    return 0;
}

Need a hint?

Make sure your output matches exactly, including spaces and new lines.