If Else structures

08IfElse.bat

::This program is used to demonstrate the if else decision making structures


@echo off
set /A var_1=10
set /A var_2=20

::apply if else to check if two variables are same or different
if %var_1%==%var_2% (echo var_1 and var_2 are equal) else (echo var1 and var2 are not equal )

::apply if to check if variable is already defined
if DEFINED var_1 (echo var_1 is defined)
if NOT DEFINED var_2 (echo var_2 is undefined, hence defining again && set /A var2=21) else (echo var_2 is defined)

::apply if to check if file specified exists or not
if exist 05Data.txt (echo 05Data.txt file exists) else (echo 05Data.txt file does not exist)

pause

Output