shel while循环示例小结

　　[root@openEuler ~]# cat while4.sh

　　#!/bin/bash

　　price=$[ $RANDOM % 100 ]

　　time=0

　　while true

　　do

　　read -p 'Please enter product price [0-99]: ' input

　　let time++

　　if [ $input -eq $price ]; then

　　echo 'Good luck, you guessed it.'

　　echo 'You have guessed $time times.'

　　exit 0

　　elif [ $input -gt $price ]; then

　　echo "$input is to high"

　　else

　　echo "$input is to low"

　　fi

　　if [ $time -eq 5 ]; then

　　echo "You have guessed is 5 times. exit"

　　exit 1

　　fi

　　done

　　[root@openEuler ~]# bash while4.sh

　　Please enter product price [0-99]: 50

　　50 is to low

　　Please enter product price [0-99]: 80

　　80 is to high

　　Please enter product price [0-99]: 70

　　70 is to high

　　Please enter product price [0-99]: 60

　　60 is to low

　　Please enter product price [0-99]: 65

　　65 is to low

　　You have guessed is 5 times. exit

　　[root@openEuler ~]#