Declaring, reading and printing of different data types

Example 1: Displaying Different Data Types

This example demonstrates how to declare and print different data types in C, including int, float, double, and char.

#include <stdio.h>

int main() {
    int a = 10;
    float b = 5.25;
    double c = 10.123456;
    char d = 'A';
    
    printf("Integer: %d\n", a);
    printf("Float: %.2f\n", b);
    printf("Double: %.6lf\n", c);
    printf("Character: %c\n", d);
    
    return 0;
}

Integer: 10
Float: 5.25
Double: 10.123456
Character: A

Example 2: Size of Different Data Types

This example shows how to find the size of each data type using the sizeof() function.

#include <stdio.h>

int main() {
    printf("Size of int: %lu bytes\n", sizeof(int));
    printf("Size of float: %lu bytes\n", sizeof(float));
    printf("Size of double: %lu bytes\n", sizeof(double));
    printf("Size of char: %lu bytes\n", sizeof(char));
    
    return 0;
}

Size of int: 4 bytes
Size of float: 4 bytes
Size of double: 8 bytes
Size of char: 1 byte

Example 3: Constants in C

This example demonstrates how to define and use constants in C using the const keyword.

#include <stdio.h>

int main() {
    const int a = 10;
    const float b = 3.14;
    
    printf("Constant Integer: %d\n", a);
    printf("Constant Float: %.2f\n", b);
    
    return 0;
}

Constant Integer: 10
Constant Float: 3.14