4. Answer the following questions.
1. Explain the SCREEN statement used in QBASIC with an example.
Answers
Answer:
A program must have a SCREEN statement before it does any graphics. A computer that is more than fifteen years old might need to use one of the older SCREEN modes. We will always use SCREEN 12. Here is a graphics program which puts one spot on the monitor screen. To be safe, close down any other programs you have running on your computer before you run this one.
'Put a spot on the screen at column 30 row 50
SCREEN 12
PSET (30, 50)
END
When you run the program, the QBasic system starts up the graphics hardware and a graphics screen will appear on your monitor. This screen is a temporary replacement for the screen that you usually see on your monitor. You should see a small spot close to the upper left of the monitor screen.
Explanation: