Lua ~= 1/== 1

[Wavoz]

Hello
I have been surfing on lua.org but finding answers to your questions is difficult when you are not native English speaker, so i need to understand few things. I pretty much understand what some functions do and i know how to fix some problems and i can modify scripts for my own need but i can't make script from scratch. I just realized i've been using this same style for a while and i don't quite understand it.

Ive made this script: (Summons Assassin if you use sleeping body on a bed)

function onUse(cid, item, fromPosition, itemEx, toPosition)
local storageValue = 26000 
	if(getPlayerStorageValue(cid, storageValue) ~= 1) then
	doSummonCreature("Assassin", getClosestFreeTile(cid,  getThingPos(cid)))
	doSendMagicEffect(toPosition,12)
     doPlayerSendTextMessage(cid, 22, 'You have woken the Assassin!')
     setPlayerStorageValue(cid, 26000, 1)
 	return true
end
	if(getPlayerStorageValue(cid, storageValue) == 1) then
     doPlayerSendTextMessage(cid, 22, 'Assassin is in a deep sleep, do not push your luck again!')
		end
		return TRUE
	end

What does ~= 1 means? I understand that ==1is like "yes", so ~=1 is like no? Can i use ==0 as no? Are these numbers like conditions because sometimes they go over 1, 2, 3?

I would appreciate if someone could explain me.

 

[Nottinghster]

== like
~= different

 

[Wavoz]

== like
~= different

That was short and simple answer, what about the numbers? 1=value? 2?

 

[City]

== means 'equal to'

~= means 'if not' or 'different than'

Example:

1+1 == 2

1+1 is equal to 2
1+1 = 2

1+1 == 2 returns true.


Example 2:

1+2 ~= 5

1+3 ~= 5(=5) ? No, that's wrong. And that's how it works , now it returns true

If the answer is wrong or different than it's supposed to be ( in this case, 1+3 = 5 is actually 1+3 = 4, so it returns true )

1+1~= 2 will return false

 

[Nottinghster]

Explaining your script

if(getPlayerStorageValue(cid, storageValue) ~= 1) then

If the storage value is different (~=) than 1, then the code will execute this part

doSummonCreature("Assassin", getClosestFreeTile(cid,  getThingPos(cid)))
doSendMagicEffect(toPosition,12)
doPlayerSendTextMessage(cid, 22, 'You have woken the Assassin!')
setPlayerStorageValue(cid, 26000, 1)

Else if the storage value is equal (==) to 1, the script will execute the message

doPlayerSendTextMessage(cid, 22, 'Assassin is in a deep sleep, do not push your luck again!')

It's easy bro!
Hope u get it ;]

 

[Wavoz]

Ye i've always known when to use it but i didn't understand why is it like that. I get it now, i would like to thank both of you!

 

[Nottinghster]

You're welcome bro ;]