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  1. or download this
    if (foo()) {
    print "Everything is copacetic!\n";
} else {
    print "Whoops! Something went terribly wrong!\n";
}
  2. or download this
    if (foo()) {
    print "Everything is copacetic!\n";
} else {
    print "Error: $!\n";
}
  3. or download this
    ($value, $errorMsg) = foo();

...
} else {
    print "Error: $errorMsg\n";
}