PRG: Created page with "{{CatUp|Properties}} __TOC__ == Introduction == Strings are sequences of characters, letters, numbers, letters AND numbers, symbols, and so forth. A script of

 x = "Hi mom" y = "123456" z = "Bob12345" n = "abc!@#$%^&*()123456789"  print (x) print (y) print (z) print (n)

will print in the output bar Hi mom, 123456, Bob12345, and abc!@#$%^&*()123456789 . Strings differ from Numbers in that you can't allocate a name like "Bob" to numbers...."

2024-12-10T22:12:41Z

Created page with "{{CatUp|Properties}} __TOC__ == Introduction == Strings are sequences of characters, letters, numbers, letters AND numbers, symbols, and so forth. A script of <pre> x = "Hi mom" y = "123456" z = "Bob12345" n = "abc!@#$%^&*()123456789" print (x) print (y) print (z) print (n) </pre> will print in the output bar Hi mom, 123456, Bob12345, and abc!@#$%^&*()123456789 . Strings differ from Numbers in that you can't allocate a name like "Bob" to numbers...."

New page

{{CatUp|Properties}}
__TOC__

== Introduction ==

Strings are sequences of characters, letters, numbers, letters AND numbers, symbols, and so forth.

A script of

<pre>
x = "Hi mom"
y = "123456"
z = "Bob12345"
n = "abc!@#$%^&*()123456789"

print (x)
print (y)
print (z)
print (n)
</pre>

will print in the output bar Hi mom, 123456, Bob12345, and abc!@#$%^&*()123456789 . Strings differ from [[Numbers]] in that you can't allocate a name like "Bob" to numbers.

Another important note with strings is that if you try to perform arithmetic on a string value, it will try to convert the string to a number. If your value can't be converted to a number, you will get an error.

Example:

print ("5"+1) 
6 
print ("whoops"+1) 
Cmd:1: attempt to perform arithmetic on a string value

In the first example, "5" was converted from a string to a number (notice "5" was in quotes, but 1 was not.)
In the second example "whoops" could not be converted to a number, because it was a word.

Although lua will convert strings with arithmetic (+, -, *, /), it won't automatically convert strings with comparisons. You have to convert a string to a number manually (or a number to a string) using the tonumber() or tostring() function:

<pre>
print("50" == 50) -- false, because a string is not equal to a number.
print(tostring(50) == "50") -- true, because you converted the number 50 to a string
print(tonumber("50") == 50) -- true, because you converted the string "50" to a number
print(50 .. "" == "50") --[[ true, because you tacked on an empty
string to the end of the number 50, converting 50 to a string.--]]
</pre>

== Advanced ==

This will also work with [[hexadecimal]] numbers:
<pre>
print(0xf == 15) -- true, because 0xf is a hexadecimal number which equals 15
print(tonumber("0xf") == 15) -- true, because you converted the string "0xf" to a number, 0xf
</pre>

as well as with other based numbers, but you have to specify the base:

<pre>
print(tonumber("00001111",2)) -- prints 15
print(tonumber("00001111",2)==15) -- prints true

print(tonumber("774",8)) -- prints 508
print(tonumber("774",8)==508) -- prints true
</pre>

== Quotes ==

<pre>
print "hello"
print 'hello'
print [[hello]]
print ("hello")
</pre>

Will all result in:
hello [http://lua-users.org/wiki/StringsTutorial]

This will allow you to nest a string within another string:

<pre>
print('hello "Lua user"')
print("Its [[content]] hasn't got a substring.")
print([[Let's have more "strings" please.]])
</pre>

Will result in:
<pre>
hello "Lua user"
Its [[content]] hasn't got a substring.
Let's have more "strings" please.
</pre>

=== Multiline quotes ===

<pre>
print([[Multiple lines of text
can be enclosed in double square
brackets.]])
</pre>

Will result in:
Multiple lines of text can be enclosed in double square brackets.

An example could be:

<pre>
local m = Instance.new("Message")
m.Parent = game.Workspace
m.Text = [[Multiple lines of text
can be enclosed
in double square brackets.]]
wait(5)
m:Remove()
</pre>

===Nesting quotes===

Nested quotes rely on the use of equals signs to distinguish one nested quote from another.:

Example:
<pre>
print([=[one [[two]] one]=])
print([===[one [[two]] one]===])

Both result in:
[one [[two]] one]
</pre>

== See Also ==

[http://www.lua.org/pil/2.4.html Programming in Lua 2.4 -- Strings]

[http://www.lua.org/manual/5.1/manual.html Lua 5.1 Reference Manual]

[http://lua-users.org/wiki/StringsTutorial StringsTutorial]

[[StringValue]]

[[Category:Properties]]

String - Revision history