Odd or even

Algorithm
Step 1 : Start
Step 2 : Read number
Step 3 : If number divisible by 2 then
Print "Number is Even"
Step 3.1 : else
Print "Number is Odd"
Step 4 : Stop

Program (oddeven.sh)
# Odd or even using if-else
echo -n "Enter a non-zero number : "
read num
rem=`expr $num % 2`
if [ $rem -eq 0 ]
then
echo "$num is Even"
else
echo "$num is Odd"
fi


Output
[vijai@localhost decision]$ sh oddeven.sh
Enter a non-zero number : 12
12 is Even