printf is a powerful function So far. we've only used printf to display a string literal a series of characters enclosed in double quotation marks. When printf displays a string literal, it doesn't show the quotation marks.
printf doesn't automatically advance to the next output line when it finishes printing. To instruct printf to advance one line, we must include \n (the new-line character) in the string to be printed. Writing a new-line character terminates the current output line; subsequent output goes onto the next line. To illustrate this point, consider the effect of replacing the statement
printf(“To C, or not to C: that is the question.\n”);
by two calls of printf:
printf(“To C, or not to C: “);
printf(“that is the question.\n”);