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Home/ Questions/Q 4109618
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Editorial Team
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Editorial Team
Asked: May 20, 20262026-05-20T21:49:19+00:00 2026-05-20T21:49:19+00:00

Hello World for D looks like this: import std.stdio; void main(string[] args) { writeln(Hello

  • 0

Hello World for D looks like this:

import std.stdio;

void main(string[] args)
{
    writeln("Hello World, Reloaded");
}

from http://www.digitalmars.com/d/

But when I compile that with gdc-4.4.5 I get:

hello.d:5: Error: undefined identifier writeln, did you mean function writefln?
hello.d:5: Error: function expected before (), not __error of type _error_

Is this a D1/D2 thing? A library thing? It seems odd that writefln is a stdio library function and writeln is not.

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  1. Editorial Team
    Editorial Team
    2026-05-20T21:49:20+00:00Added an answer on May 20, 2026 at 9:49 pm

    Yes, writeln is only available in D2’s standard library.

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