CoderSyntax on Instagram: "Simple explanation:- #include Provides the write() system call (used in Linux/Unix). write(1, "Hello, world!\n", 14); 1 → file descriptor for stdout (screen) "Hello, world!\n" → message to print 14 → number of characters to write return 0; Ends the program successfully. Key point (Interview logic) printf() is a library function write() is a system call Even if printf() doesn’t exist, you can still print using write() Output:- Copy code Hello, world! 100 days Challenge