Combine two variables to form the identifier for another variable in Bash [duplicate]

Question

I want to be able to take the values of two variables and concatenate them together to form the identifier for another variable in a bash script.

  final_answer="we did it"
  one="final"
  two="answer"
  t="${one}_${two}"
  echo ${$t} # would like this to echo we did it; currently give "${$t}: bad substitution"

Not sure this is possible but it seems like bash would have this capacity somehow.

Thank you!

@JLaF : Since the answers for bash and zsh will likely look pretty different, I suggest that you ask then two separate questions, one for each language. — user1934428
– user1934428, Commented Jul 7, 2021 at 5:16

Ed Morton · Accepted Answer · 2021-07-02 22:07:33Z

2

$ echo "${!t}"
we did it

See http://mywiki.wooledge.org/BashFAQ/006#Indirection for details.

answered Jul 2, 2021 at 22:07

Ed Morton

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