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(F) You've said "use strict" or "use strict vars", which indicates + that all variables must either be lexically scoped (using "my" or +"state"), declared beforehand using "our", or explicitly qualified to say which package the global variable is in (using "::").
use strict; use warnings; ... printf "char %s is code %d, %#04x\n", $char, $code, $code;
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