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

 3. Leap year checking.

PROGRAM:

echo "enter the year:"

read n

if [ `expr $n % 4` -eq 0 ]

then

    if [ `expr $n % 100` -eq 0 ]

    then

        if [ `expr $n % 400` -eq 0 ]

        then

            echo "$n is a leapyear"   #2000

        else

            echo "$n is not a leapyear"  #1900

        fi

    else

        echo "$n is a leapyear"  #1996

    fi

else

    echo "$n is not a leapyear"  #1997

fi

OUTPUT:

[bgc@localhost ~]$ sh pc2.sh

enter the year:

1996

1996 is a leapyear

[bgc@localhost ~]$ sh pc2.sh

enter the year:

2000

2000 is a leapyear

[bgc@localhost ~]$ sh pc2.sh

enter the year:

1997

1997 is not a leapyear

[bgc@localhost ~]$ sh pc2.sh

enter the year:

1900

1900 is not a leapyear

[bgc@localhost ~]$