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Bash - get specific character from the string

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# 1  
Old 02-13-2012
Bash - get specific character from the string
Hi!

If I want to extract a character from a specific position of a string, I can use ${string:1:1} (if I want character at the position 1). How can I do the same thing, when the number of position is contained in the variable? ${string:$var:1}doesn't work, unfortunately.

Thanks in advance.
# 2  
Old 02-13-2012
It ought to work. Try ${STR:${VAR}:1}
# 3  
Old 02-13-2012
It works, just keep in mind character list is zero-based or use:
Code:
${STR:${VAR}-1:1}

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