Compare and contrast Lua's string manipulation functions: `gsub()` and `match()`. Provide examples to showcase their usage and differences.

Lua provides several string manipulation functions, including `gsub()` and `match()`, which have distinct purposes and usage patterns. Here's a comparison and contrast of these two functions: 1. `gsub()` Function: The `gsub()` function in Lua is used for pattern-based string substitution or global substitution. It allows you to find and replace occurrences of a pattern within a string with a specified replacement. The general syntax of `gsub()` is `string.gsub(mainString, pattern, replacement, [count])`. Here, `mainString` represents the original string, `pattern` specifies the pattern to be matched, `replacement` is the string to replace the matched pattern, and `count` (optional) is the maximum number of substitutions to perform. Example: ``` lua`local str = "Hello, Lua!" -- Replace all occurrences of 'a' with 'x' local newStr = string.gsub(str, '....