Value of variable is not changing on first iteration when input in loop, batch file -

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this question has answer here:

by input value of variable not changing, on next iteration , show previous input value.

set /a firstnum=0 set /a secondnum=0 :while if %firstnum% neq -99 (     set /p firstnum="enter first number"     echo first number %firstnum% ) if %secondnum% neq -99 (     :2input     set /p secondnum="enter second numer"     echo second number %secondnum%     if %secondnum% == 0  ( goto :2input ) ) goto :while

no idea want achieve peace of nonsense if want values chenge have add setlocal enabledelayedexpansion @ beginning of code , call variables !variable! instead of %variable%.


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