In Lua, string interpolation can be achieved with the help of the concatenation operator .. or by using the string.format() function.
Here are some examples:
1. Using concatenation operator:
local name = "John"
local greeting = "Hello " .. name .. "!"
print(greeting) -- Output: Hello John!
2. Using string.format() function:
local name = "John"
local age = 30
local message = string.format("My name is %s and I am %d years old.", name, age)
print(message) -- Output: My name is John and I am 30 years old.
In the example above, %s is a placeholder for a string and %d is a placeholder for a decimal number. The values of name and age are passed as arguments to string.format() in the order they appear in the string.
Both methods work effectively for string interpolation in Lua, but string.format() is more useful in situations where you need to format the string with more complex patterns or need to control the precision of the decimal numbers.