Programming Game AI by Example

gives the output of:

10

12

14

The variable a is automatically declared as a local variable and is only visi

-

ble within the loop. For loops may be exited using the

break keyword.

The other type of for loop is used to traverse tables. This has a different

syntax.

fork,vintdo

something()

end

The k and v refer to the table t’s key-value pair. Here’s an example to clarify

how it works:

data = {a=1, b=2, c=3}

for k, v in data do

print (k, v)

end

Running this snippet of code produces the output:

a1

c3

b2

As you can see, the values are not listed in the expected order. This is

because the order is undefined in Lua; it depends on how the table has been

stored internally.