while、case语句

while条件循环语句

#vi guess.sh
[PRICE(变量值) t（参数值）=0] let t++（操作一次加一)]
#ll guess.sh
#chmod 744 guess.sh
#chmod root: guess.sh
#chmod 744 guess.sh
#ll guess.sh
#./guess.sh

yes和no的循环语句
#vi yesorno.sh

case条件测试语句
#vi check.sh
#!/bin/bash
read -p "请输入一个字符，并按"

#chmod 777 check.sh
#./check.sh

转载于:https://blog.51cto.com/13956389/2287318