#!/bin/sh

​

str1='apple'

str2='bonnet'

​

#Example 1

if [ "$(expr "$str1" \< "$str2")" -eq 1 ]; then

   echo "Less than"

elif [ "$str1" = "$str2" ]; then

   echo "Equal"

elif [ "$(expr "$str1" \> "$str2")" -eq 1 ]; then

   echo "Greater than"

fi

​

#Example 2

if [ "$(expr "$str1" \<= "$str2")" -eq 1 ]; then

   echo "Less than or equal"

elif [ "$(expr "$str1" \>= "$str2")" -eq 1 ]; then

   echo "Greater than or equal"

fi