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  • This is what associative arrays are for, iterate over the array indices. Interactively, I guess you could use tab expansion but that's not iteration, that's just a typing shortcut. Commented Mar 19, 2018 at 0:42
  • Do you mean you need to list all variables starting name by B2_ ? Commented Mar 19, 2018 at 0:45
  • @GillesQuenot Yes, but but not interactively with <tab>. Commented Mar 19, 2018 at 1:55