你即將離開本站

並前往https://serverfault.com/questions/7503/how-to-determine-if-a-bash-variable-is-empty

How to determine if a bash variable is empty? - Server Fault

A variable in bash (and any POSIX-compatible shell) can be in one of three states: unset; set to the empty string; set to a non-empty string.

確定！ 回上一頁

查詢 「Bash shell variable」的人也找了：

  1. Bash set variable
    2.
  2. Bash variable
    3.
  3. Bash script variable
    4.
  4. Bash variable substitution
    5.
  5. Shell script variable
    6.
  6. Bash variable in string
    7.
  7. Shell declare variable
    8.
  8. bash +
    9.