The APL Programming Language

Hello world! Example Program

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Description | Source Code | Sample Run | Program Notes


As anyone who studies computer science knows, the first program that you usually see when studying a new language is the Hello World! Program. This program demonstrates the text output function of the APL language by displaying the message "Hello world!".

Source Code

@ This program is very simple in APL!

'Hello World!'

@ In APL, anything that is printed in quotes is printed to the terminal. (@ in APL signifies a comment)

@ If the "Hello World statement needed to be stored, then you could use the following :
h<-'Hello World'

@Typing h causes h's value to be printed to be printed.

Sample Run

Hello World!

Program Notes

This program was tested and run using an APL*PLUS compiler from Freeware.
This program was supplied thanks to
the Hello World page
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Last modified: 10:00 PM on 11/24/1996