Keywords in basic programming language
If you slow the program down you can see the program write the message to the screen. Given the state of computer speed today you should not see the paragraph displayed by lines 20 through 50, it should be cleared by the CLS statement on Line 60 before you have a chance to see it. No instruction following an END statement is executed. Line 90 shows that an END statement stops the program.Line 70 shows the message you should see after you run this program.
#Keywords in basic programming language free#
This was my first exposure to Free Open Source Software. Magazines like Enter and 3-2-1 Contact published programs for readers to copy. It was the programming language of hobbyists.
The program will always begin by executing the main function. Identifiers and Keywords Identifiers Names given to various program elements (variables, constants, functions, etc.). Lines 20 through 50 print text to the screen. Anyone who owned a personal computer in the 80s had at least conversational knowledge of BASIC. Programming in C: Basics CS10001: Programming & Data Structures Dept.This will be discussed with control structures. The END command can be included in control structures to end the program if a condition is met. That's why the PRINT command on line 90 didn't print anything. The syntax for "PRINT" is: PRINT "" END It stops the program at that line that is, anything that's added after that won't show. To insert a blank line, don't specify a string to print. Each new PRINT command will start printing on a new line. There are commands for printing to other things, like a printer, but that's to be discussed later. Any programming Language can be divided in to two categories. In the above program, when you used CLS on line 60, all of the words that were printed to the screen were wiped away. What is C C is a programming language developed at AT & T’s Bell Laboratories of USA in 1972 by Dennis Ritchie. From that example, it's fairly easy to deduce what each command does.ĬLS An abbreviation that stands for the words CLear Screen.