In order to write “Hello World!” using the Mercury programming language, you can simply create a single-line script as shown below:
write("Hello World!").
Here, write
is a built-in predicate that displays a message on the standard output. The text inside the parentheses is passed as an argument to be printed. Note that Mercury is a functional language and doesn’t have the typical main function like other languages, so you can execute this script directly within the interpreter or save it as a file with a .m extension to run using a command-line tool.
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