I want to know whats I and v in roblox and what does iv in pairs do and how it can be used?

Hey,

I andVare just standard variables we use in a forloop.

I and V can be named anything you want, just know that the variable for i is index and the variable for v is value.

The for loop is to iterate through a table of items. Think of a table as a list of items.

You create a table like this:

local Table={"Variable", true, false, nil}

Any datatypes can be stored in tables.

We then use the for i, v in pairs loop to iterate, in other words "Go through" the list of items.(Table)

This is done like this:

local Table={"Variable", true, false, nil}
for i, v in pairs(Table) do
	print(i, v)
end

That code would print its Index: Number of the item that's in the table and the value: The value, being Variable, True, false and nil

Whats it usefull for? Well, going through tables....

One use could be:

local players=game:GetService("Players"):GetPlayers()

for i, v in pairs(players) do
	Instance.new("Intvalue", v)
end

That code would iterate through all of the players of the game and insert a IntValue instance inside the player.

As I said, i and v could be named anything so this code would work just as well :

for index, value in pairs(game.Workspace:GetChildren()) do
	print(index, value)
end

Have you ever wanted to have the abilty to delete all of the parts in the workspace? You can accomplish just that using a for loop.

local parts=game.Workspace:GetChildren()

for i, v in pairs(parts) do
	if(v:IsA("Part")) then
		v:Destroy()
	end
end

To conclude, there are many uses for generic for loops and I suggest you experiment with this and hopefully become a for loop expert!!

Cheers!