Shell Programming and Scripting

a=1
b=3
c=6
d=30

e=max($a, $b, $c, $d)

a="1"
b="3"
c="5"
d="50"

if [ "$a" -gt "$b" ];
then
        t=$a
        else
        t=$b
fi
if [ "$t" -lt "$c" ];
then
        t=$c
fi
if [ "$t" -lt "$d" ];
then
        t=$d
fi
echo $t

a=1
b=3
c=6
d=30
m=0
for i in $a $b $c $d; do
  if [ $m -lt $i ]
  then
    m=$i
  fi
done
echo $m

max(){
  m=0
  for i in "$@"; do
    if [ $m -lt $i ]; then
      m=$i
    fi
  done
  echo $m
}

a=1
b=3
c=6
d=30
m=$(max $a $b $c $d)
echo $m

e=`max $a $b $c $d`

echo -e "$t\c"

# create some output, sort it, take the 1st line
for f in $a $b $c $d
do
     echo $f
done | sort -n -r | head -1

#!/usr/bin/ksh
#max.sh
for f in $*
do
     echo $f
done | sort -n -r | head -1

chmod a+rx max.sh
./max.sh 233 444 22 444 55  666