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to the variable must also be enclosed in quotes, because the quotes are not special delimiting syntax; these characters represent themselves.

IF "%foo%"=="bar" ECHO Equal

The delayed !VARIABLE! expansion available in Windows 2000 and later may be used to avoid these syntactical errors. In this case, null or multi-word variables do not fail syntactically because the value is expanded after the IF command is parsed:IF !foo!==bar ECHO Equal

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