Alors voila, me remettant au Batch, il y a quelques petites choses que je ne comprends pas forcément.

Dans la ligne 2 je comprends que c'est une instruction avec deux commandes echo, mais à la ligne 3 je ne comprends pas le fonctionnement de ce que l'on appelle "instruction combinée", pourriez vous m'éclairer un petit peu? Merci d'avance.

Bonjour,

Voici ce que j'ai trouvé :

&    seperates commands on a line.

&&    executes this command only if previous command's errorlevel is 0.

||    (not used above) executes this command only if previous command's errorlevel is NOT 0

>    output to a file

>>    append output to a file

<    input from a file

|    output of one command into the input of another command

^    escapes any of the above, including itself, if needed to be passed to a program

"    parameters with spaces must be enclosed in quotes

+ used with copy to concatinate files. E.G. copy file1+file2 newfile

, used with copy to indicate missing parameters. This updates the files modified date. E.G. copy /b file1,,

%variablename% a inbuilt or user set environmental variable

!variablename! a user set environmental variable expanded at execution time, turned with SelLocal EnableDelayedExpansion command

%<number> (%1) the nth command line parameter passed to a batch file. %0 is the batchfile's name.

%* (%*) the entire command line.

%<a letter> or %%<a letter> (%A or %%A) the variable in a for loop. Single % sign at command prompt and double % sign in a batch file.

Source : stackoverflow.com

Tu trouveras quelque détails ici et là.