Why does this not work

[Cleptography]

set str=operation
if "%str%"==str echo.%str%

[Ed Dyreen]

Euhhh
set str=operation
if "%str%"=="str" echo.%str%

[renzlo]

Try this:

setlocal enabledelayedexpansion
set str=operation
if '!str!'=='str' echo. %str%

im no pro on this

[dbenham]

set str=operation
if "%str%"==str echo.%str%

What is not working Nothing happens as expected.

"operation" <> str so echo does not fire.

Dave Benham

[orange_batch]

lol 3 people missed the obvious error.

[Ed Dyreen]

☺
Which error did we miss ?

Code: Select all

@echo off

echo.errorlevel=%errorlevel%

set str=operation
if "%str%"==str echo.%str%

echo.errorlevel=%errorlevel%

pause
exit

Code: Select all

errorlevel=0
errorlevel=0
Druk op een toets om door te gaan. . .

[orange_batch]

Not error levels. Bad syntax.

Batch is interpreted as text, there's no literal or non-literal working with variables with the exception of set /a expressions. Quotations exist as regular characters too, the only difference being they toggle DOS's interpretation of special characters.

Code: Select all

set str=operation
if "%str%"==str echo.%str%

Is the same as:
if "operation"==str

Code: Select all

set str=operation
if "%str%"==%str% echo.%str%

Is the same as:
if "operation"==operation

Code: Select all

set str=operation
if "%str%"=="operation" echo.%str%

Works, as would "%str%" obviously. This is what dbenham is talking about.

[Cleptography]

@orange_batch
Well I'll be god damned. Good observation
That is a first.