LINUX SEHLL PROGRAM FOR FINDING PRIME NUMBER | GIVEN NO IS PRIME OR NOT | OPERATING SYSTEM (OS) LAB IN LINUX ENVIRONMENT

AIM:
To write a shell program to check whether the given number is prime or not.
ALGORITHM:
· Get the given string.
· Separate the digits using the formula q=`expr $n % 10`.
· Calculate sum of cube of digits by the formula a=`expr $a + $r /* $r /* $r`.
· Compute the and display result .


PROGRAM SOURCE CODE
echo ”enter the number”
read n
c=0
i=2
t=`expr $n-1`
while [ $i –le $t ]
do
q= `expr $n % $i `
if [ $q=0 ]
then
c=`expr $c + 1`
fi
i=`expr $i + 1`
done
if [ $c –eq 0 ]
echo “the number $n is prime number”
else
echo “the number $n is not prime number”
fi
CONCLUSION:
Thus the shell program to check whether a number is prime or not is written and executed successfully.


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