JavaScript: Difference between revisions

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m Reverted edits by 115.118.202.184 (talk) to last version by Rostz
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There is no built-in [[Input/output|I/O]] functionality in JavaScript; the runtime environment provides that. In a web browser, here is the simplest "hello world" example:
<syntaxhighlight lang="javascript">
alert("Hello world!!!");
</syntaxhighlight>