When do we use 2 equals when identifying the value of a variable?

Question

I'm learning how to use the LOVE engine, which uses Lua, but this engine cannot identify an error about, you know, if you need to do this:

if value=1 then

or

if value==1 then

to the engine identify a variable, so I'm asking this to prevent errors.

Lua is better than most languages about this, since `value = 1` is not an expression, so it cannot go in an `if` statement. You should have gotten a compile error when you tried to execute that. — Nicol Bolas, Oct 15 '16 at 03:12
Very unclear what it is you are asking here. The first line of code would cause a syntax error at runtime, crashing your program. `=` is assignment, `==` is equality. [RTFM](https://www.lua.org/manual/5.1/). — Oka, Oct 15 '16 at 03:28
@NicolBolas - The compilation error is the following: `'then' expected near '='`. Of course, this is very cryptic for beginner to understand the real reason of the error. — Egor Skriptunoff, Oct 15 '16 at 10:49
You can't prevent errors; you have to reduce and manage them. Reading a manual is one way to reduce them. The Lua Reference Manual is concise and straightforward. To manage errors, you can use tools such as compilers, IDEs and tests. `luac` is a compiler that you likely have already. See the tag info pages for [Lua](http://stackoverflow.com/tags/lua/info) and [LÖVE](http://stackoverflow.com/tags/love2d/info). — Tom Blodget, Oct 15 '16 at 14:03

score 0 · Accepted Answer · answered Oct 15 '16 at 08:21

0

if value==1 then etc.

answered Oct 15 '16 at 08:21

DarkWiiPlayer

1 Answers1