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lang-bash
!exclamation markprintf '%s\n' "${!name}"for?bashparameter expansion..read thisdeclare/eval:printf -v varname '%fmt' args. Some bash-completion internal functions use this for call-by-reference. (pass the name of a variable to store into).declareonly sets the variable in the local scope, while theevalapproach sets it globally.declarehas flag-gto declare variable to be a global.