Write script to print given numbers sum of all digit,

rajeshkumar created the topic: Write script to print given numbers sum of all digit,
Write script to print given numbers sum of all digit, For eg. If no is 123 it’s sum of all digit will be 1+2+3 = 6.

#!/bin/bash
#
#
# Algo:
# 1) Input number n
# 2) Set sum=0, sd=0
# 3) Find single digit in sd as n % 10 it will give (left most digit)
# 4) Construct sum no as sum=sum+sd
# 5) Decrment n by 1
# 6) Is n is greater than zero, if yes goto step 3, otherwise next step
# 7) Print sum
#
if [ $# -ne 1 ]
then
echo "Usage: $0 number"
echo " I will find sum of all digit for given number"
echo " For eg. $0 123, I will print 6 as sum of all digit (1+2+3)"
exit 1
fi

n=$1
sum=0
sd=0
while [ $n -gt 0 ]
do
sd=expr $n % 10
sum=expr $sum + $sd
n=expr $n / 10
done
echo "Sum of digit for numner is $sum"

#
# ./ch.sh: vivek-tech.com to nixcraft.com referance converted using this tool
# See the tool at http://www.nixcraft.com/uniqlinuxfeatures/tools/
#

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn