Write a shell script to print sum of digits of the given number. Get input from user and display the result. In case of negative number is given as input, display "Not a positive number" as output....

Write a shell script to print sum of digits of the given number. Get input from user and display the result. In case of negative number is given as input, display "Not a positive number" as output.

Sample Input 1:

123

Sample Output 1:

Sum of digit for given number is 6

Sample Input 2:

-123

Sample Output 2:

Not a positive number