SHELL

batch script if statement

@echo off 
SET str1 = String1 
SET str2 = String2 

if %str1%==String1 (echo "The value of variable String1") else (echo "Unknown value") 
if %str2%==String3 (echo "The value of variable c is String3") else (echo "Unknown value")

batch file if statement

if %var1%=="Yes" echo Var1
if %var1%=="Yes" (
    echo Var1
)