string.reverse()

The string.reverse() function in Lua takes a string as input and returns a new string that contains the characters of the original string in reverse order. This can be useful for various applications, including text manipulation and encoding.

Syntax

string.reverse(s)

Parameters

Return Value

Returns a new string that is the reverse of the input string. If the input string is empty, an empty string is returned.

Examples

Example 1: Basic String Reversal

Reverse a simple string.

local reversed = string.reverse("Hello")
print(reversed)  -- Output: olleH

Example 2: Reversing a Longer String

Reverse a longer string with spaces.

local reversed = string.reverse("Lua Programming")
print(reversed)  -- Output: gnimmargorP auL

Example 3: Empty String

Demonstrate behavior when the input string is empty.

local reversed = string.reverse("")
print(reversed)  -- Output: (empty string)

Example 4: Special Characters

Reverse a string containing special characters.

local reversed = string.reverse("!@#")
print(reversed)  -- Output: #@!

Use Cases

• Text Manipulation: Reversing strings for encoding or decoding data.
• Data Processing: Useful in algorithms that require string reversal, such as palindromic checks.

See also

• string.len(): Returns the length of a string, which can be helpful in combination with string.reverse() for processing.