What does calculate and print to the screen mean?
You can use the instruction printf to print the result to a stream, the standard output, which is the terminal's screen. c:\>my_program Hello World c:\>▍ Even then you can intercept it and redirect, e.g. it to a file. e.g. C:\>my_program > file.txt
It means "display text" so the user can read it. Programming languages often use a command like "print" for that, because computers from 50 years ago didn't have screens and literally printed all output on a strip of paper. Python example: https://ideone.com/jjPam2
It would display the result.