table.concat()

The table.concat() function combines the values of a table into a single string, optionally using a specified separator between each value.

Syntax

table.concat(tableData, separator, start, end)

Parameters

Name
tableData
Type
table
Description
The table whose values will be concatenated into a string.
Name
separator
Type
string|nil
Description
Optional. A string used as a separator between the values. Defaults to an empty string if not provided.
Name
start
Type
number|nil
Description
Optional. The starting index for concatenation. Defaults to 1.
Name
end
Type
number|nil
Description
Optional. The ending index for concatenation. Defaults to the length of the table.

Return

Returns a string that consists of the concatenated values of the specified table.

The table.concat() function is useful for creating a single string from multiple values stored in a table. If the separator parameter is provided, it will be inserted between each value. The start and end parameters allow for specifying a subrange of the table to concatenate.

Examples

Concatenating without a separator

local fruits = {"Apple", "Banana", "Cherry"}
print(table.concat(fruits))  
-- Output: AppleBananaCherry

Concatenating with a separator

local fruits = {"Apple", "Banana", "Cherry"}
print(table.concat(fruits, ", "))  
-- Output: Apple, Banana, Cherry

Specifying a range

local numbers = {10, 20, 30, 40, 50}
print(table.concat(numbers, "-", 2, 4))  
-- Output: 20-30-40

Concatenating with default parameters

local words = {"Hello", "World"}
print(table.concat(words, " "))  
-- Output: Hello World