Until practice of Shell Programming basics

First, the grammar

until [Condition]  # and while on the contrary, when the condition condition is established, the loop is terminated, or the program segment that continues the loop does     #执行内容done  

Second, practice

2. Enter the user input parameters until the user enters "end" to end the loop
   

   Untilread-p "Plz input a Paramter": paramtest $param = "End" Doecho "$param"  Done

   [Email protected]:~$./test.shPlz input a paramter:aaplz input a paramter:bbplz input a paramter:ccplz input a paramte R:end[email protected]:~$

3. Natural number of outputs from 1 to 5
   

    i=1  until  [  "  $i   "-gt  do  echo   "  $i   " i  =$ (($i +1   done  

   [Email protected]:~$./test. SH 1 2 3 4 5 [email protected]:~$

Until practice of Shell Programming basics