Accept numbers and perform addition subtraction division and multiplication

echo "Enter First Number := "
echo "Enter First Number := "
read a
echo "Enter Second Number := "
read b
ans=`expr $a + $b`
echo "Addition is :=" $ans

ans=`expr $a - $b`
echo "Subtraction is :=" $ans

ans=`expr $a / $b`
echo "Division is :=" $ans

ans=`expr $a \* $b`
echo "Multiplication is :=" $ans

Output:

 

MCA Semester 3 Operating system Programs