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Is there a way to say something like
if %1 == 1 or %1 == 2
in a batch file? Or, even better, if I could specify a set of candidate values like
if %1 in [1, 2, 3, 4, ... 20]
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One of the common uses for the 'if' statement in Batch Script is for checking variables which are set in Batch Script itself. The evaluation of the 'if' statement can be done for both strings and numbers.
Use double percent signs ( %% ) to carry out the for command within a batch file. Variables are case sensitive, and they must be represented with an alphabetical value such as %a, %b, or %c. Required. Specifies one or more files, directories, or text strings, or a range of values on which to run the command.
doc or . txt extension in the current directory is substituted for the %f variable until the contents of every file are displayed. To use this command in a batch file, replace every occurrence of %f with %%f. Otherwise, the variable is ignored and an error message is displayed.
&& runs the second command on the line when the first command comes back successfully (i.e. errorlevel == 0 ). The opposite of && is || , which runs the second command when the first command is unsuccessful (i.e. errorlevel != 0 ).
The "and" turns out to be easy -- just not the syntax you expect: These 3 examples illustrate it.
In words: If 1==1 AND 2==2 Then echo "hello"
if 1==1 echo hello hello if 1==1 if 2==2 echo hello hello if 1==1 if 2==1 echo hello (nothing was echoed) One way to implement logical-or is to use multiple conditionals that goto the same label.
if %1 == 1 goto :cond if %1 == 2 goto :cond goto :skip :cond someCommand :skip To test for set membership, you could use a for-loop:
for %%i in (1 2 3 4 ... 20) do if %1 == %%i someCommand Note that == is the string equality operator. equ is the numeric equality operator.
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