Shell Programming and Scripting

$sh max.sh
4 6 8 9
The highest number is: 9

$sh max.sh 6 8 9
The highest number is: 9

#!/bin/bash

read num
MAX="0"
for i in $num; do
   if [ $MAX -lt $i ] ; then
   MAX=$(echo $i)
   fi
done
echo "The highest number is: $MAX"

#END

#!/bin/bash

typeset -i MAX=0
for ((i=1;i<=$#;i++))
do
   eval a=\$$i
   if [ $a -gt $MAX ] ; then
      MAX=$a
   fi
done
echo "The highest number is: $MAX"

max.sh: 3: typeset not found
max.sh: 4 Syntax error: Bad for loop variable

MAX=0

#!/usr/local/bin/bash

MAX=0
for ((i=1;i<=$#;i++))
do
   a=${!i}
   if [ $a -gt $MAX ] ; then
      MAX=$a
   fi
done
echo "The highest number is: $MAX"

Syntax error: Bad for loop variable