12345678910#include <stdio.h> int main() { double x = 12.0; if (x == 12) printf("Hi"); else printf("Welcome"); return 0;}

The code you've written is in C language. It's a simple program that checks if the value of variable 'x' is equal to 12. If it is, it prints "Hi". If it's not, it prints "Welcome".

Here's a step-by-step explanation:

1. #include <stdio.h>: This is a preprocessor command that includes the standard input-output library in the program.

2. int main() {: This is the main function where the program execution begins.

3. double x = 12.0;: Here, a variable 'x' of type double is declared and initialized with the value 12.0.

4. if (x == 12) printf("Hi");: This is an if statement that checks if the value of 'x' is equal to 12. If it is, it prints "Hi".

5. else printf("Welcome");: This is the else part of the if-else statement. If the condition in the if statement is not met (i.e., 'x' is not equal to 12), it prints "Welcome".

6. return 0;: This statement ends the main function and returns the value 0.

7. }: This is the closing brace for the main function.

In this case, the output of the program will be "Hi" because the value of 'x' is indeed 12.0.