411 REFERENCE · Wikibooks
Shell Programming/Arrays
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
To assign a value to an element of an array simply do
ArrayName[2]=ValueForArrayNameIndex2
To expand the value of an index of an array do
${ArrayName[2]} # This equals 'ValueForArrayNameIndex2'
The arrays don't need to be full or compact (i.e. there can be null values between some interval of indexes).