What’s the difference between creating a string with quotes and square brackets?

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I’ve always created the strings with the quotation marks, like this:

local minhaString = "Eu sou uma string"

I downloaded a source to give a study in the language and I came across the following way to create a string:

local query = [[
SELECT *
FROM `pointshop_data`
WHERE uniqueid = '%s'
]]

What is the advantage/difference in using the [[ / ]]? How I pass the parameter %s?

string lua

2 answers

4


The square bracketed shape is more crude, it essentially does not work with special characters and considers "everything" as text, including when skipping the line. It’s like using the @ of the C#.

To use arguments to be inserted in the text you must use the function string.format().

2

The main difference is that strings created with quotes accept escape sequences as \n and \t. Strings created with brackets do not interpret any escape sequence. See the manual.

The %s in your example indicates that probably the string will be used as format in string.format. Other than that, there is no special meaning.

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