#!/bin/sh
 #.*$ - comment
echo ${variable##*i} # prints "s bob"
 #.*$ - comment
echo ${variable#*n} # prints "ame is bob"
echo ${#variable} # prints 17
echo ${#array[*]} # prints 4
echo $# + 1 # prints 0
# Incidentally, all of the $ variables should be variable markup 
# (i.e. $#, $@, $?, $!, $*, $-, $,ドル $[0-9] and ${[0-9][0-9]*})
echo $# 
echo $@ $? $! $* $- $$ 8ドル ${12}
echo "comment" ### this is a comment