while條件循環語句
#vi guess.sh
[PRICE(變量值) t（參數值）=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的循環語句
#vi yesorno.sh
case條件測試語句
#vi check.sh
#!/bin/bash
read -p "請輸入一個字符，並按"
#chmod 777 check.sh
#./check.sh