CHECKING WHETHER THE GIVEN NUMBER IS ARMSTRONG OR NOT

CHECKING WHETHER THE GIVEN NUMBER IS ARMSTRONG OR NOT

AIM:

            To check whether the given Number is Armstrong Number or not using Shell Programming.

ALGORITHM:

Step 1: Start

Step 2: Read the value of ‘num’

Step 3: Store the value of ‘num’ in ‘x’ and initialize the value of sum = 0.

Step 4: When the value of ‘num’ is greater then 0, solve the following expressions

Step 5: y = num/10; z=y*y*y; sum=num+z; num=num/10

Step 6: Close the While Loop

Step 7: Check if ‘x’ is equal to ‘sum’

Step 8: Print the Result

Step 9: Stop.

SHELL PROGRAM:

echo "Enter a Number"

read num

x=$num

sum=0

while [ $num -gt 0 ]

do

y=`expr $num % 10`

z=`expr $y \* $y \* $y`

sum=`expr $sum + $z`

num=`expr $num / 10`

done

if [ $x -eq $sum ]

then

echo "$x is an armstrong Number"

else

echo "$x is not an armstrong Number"

fi

SAMPLE OUTPUT:

Enter a Number

153

153 is an armstrong Number

[Cseb19@sathish-desktop]# sh arm.sh

Enter a Number

123

123 is not an armstrong Number

RESULT:

            Thus the Shell Program to check whether the given Number is Armstrong or not was executed and the output was verified.