How to check if the name of a part starts with a certain phrase?

I am making a disco floor and in the disco floor's code I am doing this:

for i,v in pairs(script.Parent.Parts:GetChildren()) do
	if v.Name == "discoPart" then
		-- Insert disco code here
	end
end

I want to make my disco floor more sophisticated, but not put a script in every block, so how do I check if the part name starts with disco but then it doesn't matter what else follows?

By using the sub[string] method of the string library.

for i,v in pairs(script.Parent.Parts:GetChildren()) do
    if v.Name:sub(1,5) == "disco" then
        -- Insert disco code here
    end
end