In Lua, a function or method can return a value using the return keyword followed by the value to be returned. Here's an example of a function in Lua that returns a string value:
function greet(name)
return "Hello, " .. name .. "!"
end
In the above example, greet is a function that takes a name parameter and returns a greeting string. The return keyword followed by the greeting string concatenation is the value that will be returned when the function is called.
To use this function, we can simply call it and pass in a name argument:
print(greet("John")) -- Would print "Hello, John!"
In this example, greet("John") is a function call that passes in the argument "John" for the name parameter. print is then called with the returned value of the greet function as its argument, resulting in "Hello, John!" being printed to the console.