Unix Shell Programming Example for B.Sc, B.Tech, BCA, MCA

 4.Check a number whether it is odd positive,odd negative,even positive,even negative.

PROGRAM:

echo "enter a number:"

read n

if [ $n -ge 0 ]

then

    if [ `expr $n % 2` -eq 0 ]

    then

        echo "$n is a even positive number"

    else

        echo "$n is a odd positive number"

    fi

else

    if [ `expr $n % 2` -eq 0 ]

    then

        echo "$n is a even negative number"

    else

        echo "$n is a odd negative number"

    fi

fi

OUTPUT:

[bgc@localhost ~]$ sh 5.sh

enter a number:

3

3 is a odd positive number

[bgc@localhost ~]$ sh 5.sh

enter a number:

0

0 is a even positive number

[bgc@localhost ~]$ -9

bash: -9: command not found...

[bgc@localhost ~]$ sh 5.sh

enter a number:

-9

-9 is a odd negative number

[bgc@localhost ~]$ sh 5.sh

enter a number:

-10

-10 is a even negative number

[bgc@localhost ~]$