Purpose of using colons with parameters

[ProxyRequest (Sif)]

What’s the purpose of using colons " : " with parameters of functions?

[12345koip]

You’re just declaring the data type of each parameter you’re sending in. In Lua, you don’t need to do this. In other languages, you do.

It does improve readability, but like I said above, it isn’t necessary in Lua.

Something important to note is that if you do declare the expected parameter type, it will not halt/error/log anything in the output if you send the wrong data type. So you could have local numberOne:number = "This isn't a number!" and it wouldn’t log any output. You can verify parameter types using typeof().

You can also put a : at the end of a function if you want to declare what return types will be returned.

local function something(parameter1:string, parameter2:number): (string)
    return tostring(parameter1..parameter2)
end

[artsolle]

In Roblox, using colons “:” with parameters in function definitions helps clarify the expected types of parameters, improving code readability and enabling better error checking during development.