#!/bin/shyes_or_no() {  echo "Is your name $* ?"  while true  do    echo -n "Enter yes or no: "    read x    case "$x" in      y | yes ) return 0;;      n | no )  return 1;;      * )       echo "Answer yes or no"    esac  done}echo "Original parameters are $*"if yes_or_no "$1"then  echo "Hi $1, nice name"else  echo "Never mind"fiexit 0