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Iterative statements are:
while (expr) statement
for (expr; expr; expr) statement
do statement while (expr);
at (prep.)
a=10;
b=20;
c=`expr $a + $b`;
printf "$c";
echo "input any number:"
read no
no=`expr $no`
i=`expr 2`
while [ $i -lt $no ]
do
if [ `expr $no % $i` -eq 0];
then
echo "$no is not a prime no.."
break 2
fi
i=`expr $i +1`
done
if [ $i -eq $no ];
echo "$no is a PRIME no..."
It is when the giver expr