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How can I declare variables which are local to functions? Regularly declared vars get exported into global scope. Example:

$ cat t.sh
function locals_test() 
{
  x="bar"
}

$ echo $x

$ locals_test 
$ echo $x
bar
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Use local:

local x=bar

Then, x will be local to the function. To declare e.g. arrays or numbers, local takes the same options as declare. Output will be two empty lines:

#!/bin/bash
function locals_test() 
{
  local x=bar
}

echo $x
locals_test
echo $x
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