string.lower

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 string.lower( )

Contents

Description

Changes any upper-case letters in a string to lower-case letters.

Arguments

string str

The string to convert.

Returns

string

A string representing the value of a string converted to lower-case.

Examples

Example

Demonstrates the use of this function.

print( string.lower( "ABCDEFG" ) )
print( string.lower( "AbCdefG" ) )
print( string.lower( "abcdefg" ) )
print( string.lower( "1234567890" ) )

Output:


abcdefg
abcdefg
abcdefg
1234567890

Examples

Example

Demonstrates a common use for string.lower - case-insensitive user input.

-- All keys in this table must be lowercase:
local products = {}
products.apple = "Buy an apple!"
products.banana = "Buy a bunch of bananas!"
products.tomato = "There's also tomatoes."

-- This function is case-insensitive, meaning "APPLE", "apple", and "APPle" are all the same.
function GetProduct(userinput)
	return userinput, products[string.lower(userinput)]
end

-- Demonstration:
print(GetProduct("apple"))
print(GetProduct("Apple"))
print(GetProduct("APPLE"))
print()
print(GetProduct("banana"))
print(GetProduct("BaNaNa"))

Output:

apple	Buy an apple!
Apple	Buy an apple!
APPLE	Buy an apple!

banana	Buy a bunch of bananas!
BaNaNa	Buy a bunch of bananas!
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