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Programming-Idioms

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  • Haskell

Idiom #59 Write to standard error stream

Print the message "x is negative" to standard error (stderr), with integer x value substitution (e.g. "-2 is negative").

import System.IO (hPutStrLn, stderr)
hPutStrLn stderr (show (x) ++ " is negative")
with Ada.Text_IO;
use Ada.Text_IO;
Put_Line (Standard_Error, Integer'Image (X) & " is negative");

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