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 reverse a number which is given as the input.
line 1: number
Print a single number which is the reverse of the given number
The following is the shell script to reverse a number which is given as the input:
echo enter n read n num=0 while [ $n -gt 0 ] do num=$(expr $num \* 10) k=$(expr $n % 10) num=$(expr $num + $k) n=$(expr $n / 10) done echo number is $num
$ enter n $ 456 $ number is 654
Let us know in the comments if you are having any questions regarding this shell script.
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what about echo $num |rev