Until practice of Shell Programming basics

Source: Internet
Author: User

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
  1. 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]:~$./test.shPlz input a paramter:aaplz input a paramter:bbplz input a paramter:ccplz input a paramte R:end[email protected]:~$
  2. 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

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