@echo off 的意思

October 06, 2024

echo [on|off] 可用來開關命令回應 (command echoing) 功能。預設值為 on。

echo 文件

echo on

命令回應功能開啟時 (預設為開啟)，每個命令之後都會跟隨一次回應。

echo on
echo This is Line 1
echo This is Line 2
echo This is Line 3
pause

D:\Projects\Test>echo on

D:\Projects\Test>echo This is Line 1
This is Line 1

D:\Projects\Test>echo This is Line 2
This is Line 2

D:\Projects\Test>echo This is Line 3
This is Line 3

D:\Projects\Test>pause
請按任意鍵繼續 . . .

echo off

命令回應功能關閉後，每個命令之後就不會再有回應了。但是第一行的 echo off 仍會顯示回應。

echo off
echo This is Line 1
echo This is Line 2
echo This is Line 3
pause

D:\Projects\Test Batch>echo off
This is Line 1
This is Line 2
This is Line 3
請按任意鍵繼續 . . .

@echo off

根據 echo 文件的內容，我們可以知道 (@) 是個通用的單行 echo off 功能。 因此要連帶第一行的 echo off 的回應一起消失，需要改寫為 @echo off。

To prevent echoing a particular command in a batch file, insert an (@) sign in front of the command. To prevent echoing all commands in a batch file, include the echo off command at the beginning of the file.

@echo off
echo This is Line 1
echo This is Line 2
echo This is Line 3
pause

This is Line 1
This is Line 2
This is Line 3
請按任意鍵繼續 . . .