A shell script is a computer program designed to be run by the Unix shell, a command-line interpreter. The various dialects of shell scripts are considered to be scripting languages. Typical operations performed by shell scripts include file manipulation, program execution, and printing text. A script that sets up the environment, runs the program, and does any necessary cleanup, logging, etc. is called a wrapper.
In this post, we will write a shell script to accept a number and print the sum of digits.
line 1: number
line 1: sum of digits
The following is the shell script to accept a number and print the sum of digits:
echo enter n read n sum=0 while [ $n -gt 0 ] do r=$(expr $n % 10) sum=$(expr $sum + $r) n=$(expr $n / 10) done echo sum is $sum
$ enter n $ 456 $ sum is 15
Let us know in the comments if you are having any questions regarding this shell script.
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