Variables

Store values in a variable using the let keyword followed by the name of the variable. Variable definitions are always in the local scope.

let x = 10

You can also define multiple variables using commas.

let width, height = 20, 50

Use these variables in your code by entering their name:

let width, height = 20, 50

println("The area is:", width * height)
# The area is: 100

To define a variable without giving a value to it use the nil value.

let something = nil

Updating Variables

Update a variable by reassigning it using an equals sign. You can only update a variable if it was declared previously in a scope or a parent scope.

let x = 10

x = 5
println(x) # prints 5

Variable Shadowing

You can shadow a variable definition by writing the let statement again. This is useful if you wanted to redefine the variable for only the current scope.

For example:

let x = 10

# Create a scope using `@ { ... }`
@ {
    let x = 50   # Redefine `x` inside the scope
    println(x)   # Prints 50
}

println(x)       # Prints 10