Final answer:
The output from printf() or putchar() functions goes to the console or command line interface of the computer.
Step-by-step explanation:
When using printf() or putchar() functions in programming languages like C, the output is typically displayed on the console or command line interface of the computer.
The printf() function is used to print formatted output to the screen. It allows you to include variables and special formatting options in the output.
The putchar() function is used to print a single character to the console. It is often used in loops to display strings or characters one by one.