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- Subject: Re: Added `continue` keyword to Lua 5.4 [code review requested].
- From: GoldenKnightFly <afiqquraisyzulkarnain@...>
- Date: Sat, 18 Mar 2023 14:26:16 +0800
`continue` is useful if you're working with input checking. For example you're checking user input through stdin, you want to check if it's valid if not do the input again.
while true do
io.write "Please input an ascii code: "
local input = io.read()
if not input:match "^%d+$" then
print "Not a number"
local ok,ch = pcall(string.char,tonumber(input))
if not ok and ch then
print("Failed to parse code:",ch)
I’ve found that if-statement nesting can be easily removed by re-evaluating (refactoring if you want a better buzz-word) your logic.
You might want to come up with a more convoluted example as one can eliminate the “continue” easily here and many other such trivial examples.
for i = 1, 10 do
if i % 2 ~= 0 then print (i) end
> for i = 1, 10 do
> if i % 2 == 0 then continue end
> print( i )
> This should really help to reduce unnecessary if-statement nesting inside loops.