Shell Script to print sum of all digits of a given number - The Coding Shala

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Shell Script to print sum of all digits of a given number

Write a shell script to print the sum of all digits of a given number?

Code: 

#!/bin/bash
n=$1
sum=0
tmp=0
while [ $n -gt 0 ]
do
tmp=`expr $n % 10`
sum=`expr $sum + $tmp`
n=`expr $n / 10`
done
echo "sum of digits is $sum"



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