How do I add 11 to %%i?

Question

I tried

set /p input2=
FOR /L %%i IN (1,1,%input2%) do ren text_%%i.txt worked_%%i+11.txt

and it just tries to rename text_1.txt to worked_1+11.txt How do I do it properly?

Thanks in advance

Answer 1

As I understand the question you want a mathematical addition.So you'll need delayed expansion and set /a :

@echo off

set /p input2=provide a number
setlocal enableDelayedExpansion
FOR /L %%i IN (1;1;%input2%) do (
 set num=%%i
 set /a nump11=num+11
 ren text_%%i.txt worked_!nump11!.txt
)