# Strings

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In Lua you define a string like that:

``name = "Alice"``

## Quotes

You can use both single quotation marks and double quotation marks to define a string:

``````tutorial = 'Usually you start a tutorial with "Hello, World!" example'
lesson = "In this lesson we're going to learn Lua syntax"``````

There is also special syntax for defining a multiline string:

``````description =
[[Welcome to Lua tutorials!
Now you know how to write "Hello, World!".
Today we will learn how to deal with Lua strings!]]``````

## Operators

To concatenate two strings use `..` operator:

``print("Hello, " .. "World!")``

Using this operator with numbers converts them into a string:

``````value = 1 .. 2
print(value .. ", " .. type(value))``````

This will output:

``12, string``

To get string length use `#` operator:

``````name = "Alice"

print(#name)``````

## Simple conversion

There are two simple conversion functions provided: `tonumber` and `tostring`:

``````a = "50"
b = 10
c = "Alice"
d = function () end

print(tonumber(a), type(tonumber(a))); -- 50    number

print(tostring(b), type(tostring(b))); -- 10    string

print(tonumber(c), type(tonumber(c))); -- nil   nil

print(tostring(d), type(tostring(d))); -- function: 0x1e79700   string``````

## Escape sequences

The following escape sequences are available in Lua:

``````sequences =
{
"\a", -- Bell
"\b", -- Back space
"\f", -- Form feed
"\n", -- New line
"\r", -- Carriage return
"\t", -- Horizontal tab
"\v", -- Vertical tab
"\\", -- Backslash
"\"", -- Double quotes
"\'", -- Single quotes
"\[", -- Left square bracket
"\]"  -- Right square bracket
}``````
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Lesson 8

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