Windows batch files: multiple if conditions

Question

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] 

Answer 1

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) 

Answer 2

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.