SUMS OF DIGITS OF AN INTEGER

SUMS OF DIGITS OF AN INTEGER

AIM:

            To write a Shell Program to calculate the sum of digits of an Integer.

ALGORITHM:

Step 1: Start

Step 2: Read the Integer as ‘num’

Step 3: Initialize the value of sum=0.

Step 4: While the value of ‘num’ is greater than 0, solve the following expressions.

Step 5: Find the remainder of ‘num’ by 10 and store in ‘y’

Step 6: Add ‘sum’ with ‘y’ and store it in ‘sum’

Step 7: Divide ‘num’ by 10 and store the value in ‘num’

Step 7: Close the while loop

Step 8: Print the Result

Step 9: Stop

SHELL PROGRAM:

echo "Enter a Number"

read num

sum=0

while [ $num -gt 0 ]

do

y=`expr $num % 10`

sum=`expr $sum + $y`

num=`expr $num / 10`

done

echo "The Sum of the Digits of the Integer is $sum"

SAMPLE OUTPUT:

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

Enter a Number

123456

The Sum of the Digits of the Integer is 21

RESULT:

            Thus the Shell program to calculate the sum of the digits of the integer was executed and the output was verified.