Union in C Programming with Examples

/*
 * C program to illustrate the concept of unions using dot operator
 */
 
#include<stdio.h>
int main()
{
#include <stdio.h>
//scope of union -> main function 
void main()
{
    union number
    {
        int  n1;
        float n2;
    };
    //initializing union number variable by using union keyword and tag name
    union number x;
 
    printf("Enter the value of n1: ");
    scanf("%d", &x.n1); //access using dot product
    printf("Value of n1 = %d", x.n1);
    printf("\nEnter the value of n2: ");
    scanf("%f", &x.n2);
    printf("Value of n2 = %f\n", x.n2);
}

Output

Enter the value of n1: 10
Value of n1 = 10
Enter the value of n2: 50
Value of n2 = 50.000000