Basic Lua problem - A if statement nested in for loop

Question

I am an amateur in Lua, l wrote this code but fail to compile, l have checked the structure of the syntax and found that it was a match, so l really do not know what is wrong, it says that 18: 'end' expected (to close 'if' at line 16) near 'startFishing' but why should l do that????? BTW startFishing is another function that l defined previously in the same file.

function detectSuccess()
    local count = 0;
    for x = 448, 1140, 140 do
        color = getColor(x, 170);
        if color == 0xffffff then 
            return false
            startFishing()
        else
            return true
        end
    end
end

startFishing() after return??

wsha
– wsha

2018-09-20 06:19:09 +00:00
Commented Sep 20, 2018 at 6:19 — wsha
– wsha, Commented Sep 20, 2018 at 6:19

mksteve · Accepted Answer · 2018-09-20 06:25:45Z

Formatting code correctly we have ....

function detectSuccess()
   local count = 0;
    for x = 448, 1140, 140 do
        color = getColor(x, 170);
        if color == 0xffffff then 
            return false
            startFishing()
        else
            return true
        end
    end
end

detectSuccess()

The startFishing() statement is dangling. syntactically the only thing that can come after return, is the else or end.

That is the complaint from the lua parser.

From lua : programming in lua 4.4

For syntactic reasons, a break or return can appear only as the last statement of a block (in other words, as the last statement in your chunk or just before an end, an else, or an until).

If you want startFishing to be called, it needs to be before the return. e.g.

function detectSuccess()
   local count = 0;
    for x = 448, 1140, 140 do
        color = getColor(x, 170);
        if color == 0xffffff then 
            startFishing() -- moved before the return
            return false
        else
            return true
        end
    end
end

lhf · Accepted Answer · 2018-09-19 17:32:31Z

4

You can't have a statement in the same block after a return. I guess you mean this instead:

if color == 0xffffff then 
   startFishing()
   return false
else
   return true
end

Indenting your code will help you seeing syntax problems.

answered Sep 19, 2018 at 17:32

lhf

72.8k11 gold badges117 silver badges162 bronze badges

Collectives™ on Stack Overflow

Basic Lua problem - A if statement nested in for loop

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related