Difference between revisions of "$?"

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<code>[[echo $?]]</code> prints the [[exit status]] of the last executed command in the terminal. The exit status is a numeric value that indicates whether the command completed successfully or encountered an error. A value of [[0]] indicates success, while non-zero values indicate an [[error]].
 
<code>[[echo $?]]</code> prints the [[exit status]] of the last executed command in the terminal. The exit status is a numeric value that indicates whether the command completed successfully or encountered an error. A value of [[0]] indicates success, while non-zero values indicate an [[error]].
 
  
 
== Examples ==
 
== Examples ==
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  echo $?
 
  echo $?
 
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  [[apt -qqq update -y && apt -qqq upgrade -y; echo $?]]
 
  [[apt -qqq update -y && apt -qqq upgrade -y; echo $?]]

Latest revision as of 06:54, 7 June 2024

echo $? prints the exit status of the last executed command in the terminal. The exit status is a numeric value that indicates whether the command completed successfully or encountered an error. A value of 0 indicates success, while non-zero values indicate an error.

Examples[edit]

mkdir -p /path/to/root/in/macos
mkdir: cannot create directory ‘/path’: Read-only file system
-p, --parents makes parents directories if needed and no error if existing

echo $?
1
apt -qqq update -y && apt -qqq upgrade -y; echo $?

Related[edit]

See also[edit]

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