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❮ Lua Coroutine Lua Metatables ❯

Lua Control Flow

Control flow statements in the Lua programming language are set through the program by defining one or more conditional statements. Specified program code is executed when the condition is true, and other specified code is executed when the condition is false.

Here is a typical flowchart of control flow:

The conditional expression of the control structure can be any value. Lua considers false and nil as false, and true and non-nil as true.

It's important to note that in Lua, 0 is considered true:

Example

--[ 0 is true ]
if(0)
then
    print("0 is true")
end

The output of the above code is:

0 is true

Lua provides the following control structures:

Statement Description
if statement An if statement consists of a boolean expression followed by one or more statements.
if...else statement An if statement can be paired with an else statement, which executes when the if condition expression is false.
nested if statements You can use one or more if or else if statements within an if or else if statement.
❮ Lua Coroutine Lua Metatables ❯