Optimize Batch Codes

There are many cool batch codes but many ae very long and inefficient here is a tutorial explaining how to shorten them for optimal prefomance.

Nearly all batch codes have an if statement
If %cho% ==Y goto yes
If %cho% ==y goto yes
But this isn't a good way to do things look at this script to select a website

Script starts here
@echo off
Cls
Echo chose a site
Echo 1 google.com
Echo 2 example.com
Set /p site=
If %site% == 1 goto 1
If %site% == 2 goto 2
:1
Start google.com
:2
Start google.com
Pause
Script_ends

What's wrong with this script first why use %site% just use %s% it's shorter not that it makes a big deal but it is shorter especially if you have a lot of sites you want to go to. Secondly don't goto 1 or 2 just type
if %s% == 1 start google.com
Again this is shorter

The next code is also inefficient

Script below
@ECHO off
Cls
Set /p cho=
If %cho% == Y goto yes
If %cho% == y goto yes
Script ends

Rather use if /I so either y or Y will be interpreted the same way
If /I %cho% ==y goto yes

This doesn't shorten the amount of text used but it can shorten the amount of lines
Using && joins two commands like this

@echo off
Cls

That works fine but you can also do this

@echo off && cls

Both will give you the same output.

Setting variables can shorten things in two different ways. The first way will be setting data the second will be setting commands.
This is the script I will use to demonstrate using the set command

Script begins
@echo off && cls
Echo type 1 for calculator
Echo type two for internet
Set /p cho=
goto %cho%
:1
Start calculator.bat
:2
Start google.com
Pause
Script_ends

now I know that I showed you how to start google.com but let's say you have a different section of code that doesn't start something this script goes to what ever the user types in.

Modified script
@echo off && cls
Set "e=echo"
%e% type 1 for calculator
%e% type two for internet
Set /p cho=
goto %cho%
:1
Start calculator.bat
:2
Start google.com
Pause
Script_ends

What this does is sets the command echo as %e% now it only shaved off one character this is 3 and echo is 4 but it can be used if you use a command a lot or can be used for a longer command like seen below.

set "var=if %word%=="
%var%1234

At the beginning of lots of scripts developers leave thir name and matey how to use it and the script becomes littered like this

Script
:: blah
:: blah
Rem blah
Rem blah
Rem blah
Script_ends

To avoid having lots of comments use this

Script
Goto skip
Blah
Blah
Blah
:skip
Script_ends

This will allow you to remove comment lines like rem or ::