New implementation

Be concise.

Be useful.

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Please try to avoid dependencies to third-party libraries and frameworks.

Other implementations
import core.stdc.stdlib;
exit(0);
erlang:halt(0).
import "os"
os.Exit(0)
import System.Exit
exitSuccess
System.exit(0);
os.exit()
exit();
halt(0);
exit 0;
import sys
sys.exit(1)
exit
std::process::exit(0);