Lua goto statement

Lua Loops

The goto statement in Lua allows the control flow to be transferred unconditionally to the statement marked with a label.

Syntax

Syntax format as shown below:

goto Label

The format of Label is:

:: Label ::

The following example shows the use of goto in conditional statements:

local a =　1
::label:: print("---　goto label　---")
a = a+1
if a <　3　then
　　　　goto label　　　--　a is less than　3　jump to the label label when it is time
end

---　goto label　---
---　goto label　---

From the output result, it can be seen that it outputs once more --- goto label ---.

The following example demonstrates that multiple statements can be set in a label:

i = 0
::s1:: do
　　print(i)
　　i = i+1
end
if i>3　then
　　os.exit()　　　--　i is greater than　3　exit at this time
end
goto s1

The output result is:

0
1
2
3

With goto, we can implement the functionality of continue:

for i=1,　3　do
　　　　if i <=　2　then
　　　　　　　　print(i, "yes continue")
　　　　　　　　goto continue
　　　　end
　　　　print(i, " no continue")
　　　　::continue::
　　　　print([[i'm end]])
end

The output result is:

1　　　yes continue
i'm end
2　　　yes continue
i'm end
3　　　　no continue
i'm end

Lua Loops