bash：声明整数变量

#!/bin/bash
# Scriptname: todebug

name="Joe Shmoe"
if [[ $name == "Joe Blow" ]]
then
      printf "Hello $name\n"
fi

declare -i num=1
while (( num < 5 ))
do
       let num+=1
done
printf "The total is %d\n", $num