Is it possible in Bash 4.0 to substring and uppercase a variable in one

Question

Given a variable var=toucan I can do the following:

echo ${var^^}
TOUCAN
echo ${var:3}
can

Is it possible to do something similar to echo ${var:3^^} to get CAN?

echo ${var:3^^}
bash: var: 3^^: syntax error: operand expected (error token is "^")

There are a lot of potential duplicates for this one. The answer still comes down to "no", whichever is used. — Charles Duffy, Jul 05 '17 at 14:33

score 2 · Accepted Answer · answered Jul 05 '17 at 14:28

2

No; bash doesn't let you combine special parameter expansions like that (for any of them, including remove-affix, value-if-null, value-if-null-or-empty, etc.) You will have to do it in two steps, or use a program outside of bash.

answered Jul 05 '17 at 14:28

Mark Reed

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Is it possible in Bash 4.0 to substring and uppercase a variable in one

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