Example
Print element at index 0
echo "${array[0]}"
4.3
Print last element using substring expansion syntax
echo "${arr[@]: -1 }"
4.3
Print last element using subscript syntax
echo "${array[-1]}"
Print all elements, each quoted separately
echo "${array[@]}"
Print all elements as a single quoted string
echo "${array[*]}"
Print all elements from index 1, each quoted separately
echo "${array[@]:1}"
Print 3 elements from index 1, each quoted separately
echo "${array[@]:1:3}"
String Operations
If referring to a single element, string operations are permitted:
array=(zero one two)
echo "${array[0]:0:3}" # gives out zer (chars at position 0, 1 and 2 in the string zero)
echo "${array[0]:1:3}" # gives out ero (chars at position 1, 2 and 3 in the string zero)
so ${array[$i]:N:M} gives out a string from the Nth position (starting from 0) in the string ${array[$i]} with M following chars.
