In Lua, you can concatenate strings using the .. operator.
Here's an example:
str1 = "Hello"
str2 = "world"
result = str1 .. " " .. str2
print(result)
Output:
Hello world
In this example, we are concatenating str1 and str2 with a space in between using the .. operator and storing the result in the result variable. Finally, we are printing the concatenated string using the print function.