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parameter=abcdef
offset=2
noffset=-2
echo "parameter '${parameter}'"
echo "varoffset2 '${parameter:${offset}}'"
echo "varoffset-2 '${parameter:${noffset}}'"
echo "literal '2' '${parameter:2}'"
# This is not inrpreted as ${VAR:POS{:LEN}},
# but as ${VAR:=WORD} - if VAR is unset or null, substitute WORD
echo "literal '-2' '${parameter:-2}'"
echo "literal ' -2' '${parameter: -2}'"
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