I've got the basics of bash scripting (I think anyways), and i'm trying to move on to more advanced stuff.I am trying to write a script that will perform input validation (the user must input either yes or no) and i'm trying to do this by combining a function and an if then else statement.This is what i'm working on so far.#!/bin/bashfunc (){     echo Enter yes or no:    read var1}if [ $var1 != yes ] || [ $var1 != no ]then    funcelse    echo I'm glag you said $var1fiexit 0I know that i'm using the wrong if then else operator/syntax, but I can't find the correct syntax threw googling.I want it to run the function if var1 is either equal to yes or no, so the user can't input something else.
Input validation in a bash script
bash;shell script