SHELL

array item bash

ARRAY=( "engineer " "CEO" "doctor" "teacher" )

for i in "${!ARRAY[@]}"
do
      echo " index---------------content"
      echo " $i                  ${ARRAY[$i]}"
done

bash arrays

#!/bin/bash

a=()
b=("reason" "logic" "aspect" "ethic")
echo ${b[2]}

array item bash

#!/bin/bash
AR=([3]='foo' [5]='bar' [25]='baz' [7]='bat')
for i in "${!AR[@]}"; do
  printf '${AR[%s]}=%s
' "$i" "${AR[i]}"
done

bash array

ss="abcdefghi"
my_array=( `echo $ss | grep -o . ` ) # split word into array

echo ${my_array[2]} 
give c

i=0
echo ${my_array[$i]}${my_array[$i+1]}xxx
give : abxxx