Functions

In Pikt, functions are essentially variables, with a block as their value, which starts with lambda.open , ends with lambda.close and contains the instructions that should be executed.

This is what an empty function looks like:

Now let's make the function print "ABC", and then call it via funcall .

The output is ABC as expected.

Arguments

Every pixel between lambda.open and the first instruction of the block is read as a function argument.
Let's try editing the previous function so that the printed value comes from an argument :

Now let's call the function with "ABC" as a parameter.
Keep in mind that each parameter is a single pixel, therefore we must store "ABC" into a temporary variable :

Return value

Functions can return values. To do so, store the value to a variable and then use a return on it.

Pseudocode:

function func() {
    var value = "ABC"
    return value
}

print(func())

Pikt:

A return statement can also come without any value if the function does not expect an output value.