RetroBASIC

Retrogamecoding(.org) => EGSL => Topic started by: Peter on November 20, 2012, 09:32:19 PM

Title: Exit for
Post by: Peter on November 20, 2012, 09:32:19 PM

Hi Cyber,

there is no EXIT FOR, what can I use for it?

Title: Re: Exit for
Post by: cvirus on November 20, 2012, 09:53:54 PM

just use

Code: [Select]

end

Title: Re: Exit for
Post by: Peter on November 20, 2012, 10:17:48 PM

Hi cvirus,

No, isn't. 
D:\EGSL\julia.lua:24: '<eof>' expected near 'end',  is what i got.

I think is rather BREAK, but I'm not sure about BREAK.

Title: Re: Exit for
Post by: Tomaaz on November 20, 2012, 10:56:36 PM

You should use break and end.

Code: [Select]

for x = 1, 1000 do
    if x > 500 then break end
    print(x)
end

Here is an explanation: http://www.lua.org/pil/4.4.html (http://www.lua.org/pil/4.4.html).

Title: Re: Exit for
Post by: cvirus on November 21, 2012, 09:49:54 AM

A simple for loop is like:

Code: [Select]

for i = 1,3 do print(i) end
The break statement immediately ends the current loop when executed, if you whant to complete the for loop then you shouldn't use break.

Code: [Select]

for i = 1, 3 do
    if ( i == 2 ) then break end
    print( i )
end

Title: Re: Exit for
Post by: Tomaaz on November 21, 2012, 10:54:24 AM

Quote from: cvirus on November 21, 2012, 09:49:54 AM

The break statement immediately ends the current loop when executed...

That's exactly what exit for in BASIC does.

Title: Re: Exit for
Post by: Bereb on November 21, 2012, 11:14:47 AM

Quote from: Peter on November 20, 2012, 10:17:48 PM

I think is rather BREAK, but I'm not sure about BREAK.

Yes, it's break. You can see an example in this topic (http://retrogamecoding.org/board/index.php?topic=17.0) :

Quote

(...)
for i = 0, 50 do
    zre2 = zre*zre
    zim2 = zim*zim
    if zre2 + zim2 > 4 then
       color(255-(i+5), i*5, i)
       dot(x,y)
       break
    end
    zim = 2*zre*zim+cim
    zre = zre2-zim2+cre
end
(...)

break exits the for-loop (and not the if-block, as we might think)

Title: Re: Exit for
Post by: Peter on November 21, 2012, 11:23:29 AM

A well done help,  inbuilt  in EGSL IDE would be more exact.

Title: Re: Exit for
Post by: Cybermonkey on November 21, 2012, 02:17:27 PM

EGSL is Lua, so it's the Lua way.  ;D BTW, "break" is a highlighted keyword in the IDE.

Title: Re: Exit for
Post by: Peter on November 21, 2012, 02:23:21 PM

LOL

Title: Re: Exit for
Post by: cvirus on November 21, 2012, 02:43:00 PM

Quote from: Bereb on November 21, 2012, 11:14:47 AM

Quote from: Peter on November 20, 2012, 10:17:48 PM

I think is rather BREAK, but I'm not sure about BREAK.

Yes, it's break. You can see an example in this topic (http://retrogamecoding.org/board/index.php?topic=17.0) :

Quote

(...)
for i = 0, 50 do
    zre2 = zre*zre
    zim2 = zim*zim
    if zre2 + zim2 > 4 then
       color(255-(i+5), i*5, i)
       dot(x,y)
       break
    end
    zim = 2*zre*zim+cim
    zre = zre2-zim2+cre
end
(...)

break exits the for-loop (and not the if-block, as we might think)

That´s right, sorry if i wan´t very clear.