Is there a function to check if something is in the game in the form of an if statement

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1

so basically how do I make a function that goes like

local food = instance.new("Part")
if [food is in the game] then

end
2

Check out :IsDescendantOf

local food = Instance.new("Part")-- your food
print(food:IsDescendantOf(game)) -- false
food.Parent = workspace
print(food:IsDescendantOf(game)) -- true
3 
local food = Instance.new("Part") -- Instance.

if food ~= nil then -- If food is different from nil then:
print("Yes")
else -- if not:
print("No")
end

I think its it.
Using if/then Statements (roblox.com)
Conditional Structures (roblox.com)

4

What do you mean by in the game? Do you mean if it exists?

5

Without parenting food first, its parent would be nil and thus it would not be a descendant of the DataModel which has the global variable named “game” point/refer to it.