C Data Types - Basic Types in C Programming

📦 C Data Types – Store Different Kinds of Values

In C, data types define the type of data a variable can hold. Whether you’re counting apples or storing grades with decimal points, C has a data type for that!

🔸 Basic Data Types in C

Here are some commonly used data types in C:

Data Type	Description	Example
`int`	Stores whole numbers	10, -5, 1000
`float`	Stores decimal numbers (single precision)	3.14, -0.5
`double`	Stores decimal numbers (double precision)	3.14159265
`char`	Stores a single character	‘A’, ‘z’

📝 Example: Declaring Different Data Types

This program shows how to declare and use basic data types in C.

#include <stdio.h>

int main() {
    int age = 25;                // Integer variable
    float height = 5.9;          // Float variable
    double pi = 3.14159265;      // Double variable
    char grade = 'A';            // Character variable

    printf("Age: %d\n", age);
    printf("Height: %.1f\n", height);
    printf("Value of Pi: %.8f\n", pi);
    printf("Grade: %c\n", grade);

    return 0;
}

Try It Now

📏 Data Type Sizes

Here’s a quick look at how much memory (in bytes) each data type generally uses:

int → 4 bytes
float → 4 bytes
double → 8 bytes
char → 1 byte

Note: Actual sizes can vary slightly depending on your system/compiler.

🎯 Pro Tip

Use %d for int, %f for float, %lf for double, and %c for char in printf().

🧪 Practice Challenge

Try creating a program that declares all 4 basic data types and prints their values using printf().