Is it possible to write multiple single-line comments in a single program?

Yes, you can write as many single-line comments as you want in your program.

Comments are simply there to help us understand the code better—they're not read or executed by the computer. So whether you're explaining a complex line or just noting something down for later, using many single-line comments is completely fine.

Here’s a quick example:

// This program prints a number
#include 

int main() {
    int number = 5; // Declare a variable
    printf("%d", number); // Print the value of number
    return 0;
}

Each // comment is considered a single-line comment, and you can write one before or after a line of code, or even leave full lines just for comments.

You can also use multi-line comments if you want to write longer explanations that span across several lines. In C, multi-line comments are written like this:

/* This is a multi-line comment.
   You can write across multiple lines,
   and it ends with a closing */