Shell Programming and Scripting

$ typeset arr[1]="foo"
$ typeset arr[2]="bar"
$ typeset arr[3]="fubar"
$ print - "${arr[@]}"        # <----
foo bar fubar
$ print - "${arr[*]}"        # <----
foo bar fubar

$ typeset arrA[1]="foo"
$ typeset arrA[2]="bar"
$ typeset arrA[3]="fubar"
$ typeset arrB[0]="foo"
$ typeset arrB[1]="bar"
$ typeset arrB[2]="fubar"

...

(( i=1 ))
while [ $i -le ${#arrA[@]} ] ; do  # check condition, notice the "-le"
     ...
      (( i += 1 ))
done

(( i=0 ))
while [ $i -lt ${#arrB[*]} ] ; do  # check condition, notice the "-lt"
     ...
      (( i += 1 ))
done