Shell program to check whether given number is divisible by 7 or not, if not find the previous and next number which is divisible by 7.

# 7divisible.sh

# Program :         To check whether given number is divisible by 7 or not, if not  

                             find the previous and   next number which is divisible by 7.

# Author :            sujith

# Date :               16/03/2015

clear

echo "Enter the number "

read n

c=`expr $n % 7`

if test $c -eq 0

 then

        echo "$n is divisible by 7"

else

     echo "$n is not divisible by 7"

     n1=`expr $n - $c`

     n2=`expr $n - $c + 7`

     echo "Previous number which is divisible is " $n1

     echo "next number which is divisible is     " $n2

fi

OUTPUT:

[141740@localhost ~]$ sh 7divisible.sh

Enter the number

52

52 is not divisible by 7

Previous number which is divisible is  49

next number which is divisible is      56

[141740@localhost ~]$

Enter the number

49

49 is divisible by 7

[141740@localhost ~]$