If command in bat file programming

Question

I have a bat file.

If "%a%" == "value1" Set folder=folder_name

........ It is working fine.
Now my requirement is to add command to copy file from source to destination based on parameter. I passed it as (example)

IF "%a%" == "value" 
Copy xyz abc

Here a passed the value to parameter a and xyz is source path and ABC is destination path.

For this If command to copy file it gives the error like incorrect syntax.

Answer 1

Try This : IF [NOT] "string1"=="string2" Do Sth

For Example =

If Not "Yes"=="No" Echo Yes

More Info = if /?