Control Flow¶

AISL provides a for loop for iteration and an append statement for building up lists incrementally.

For loops¶

The for loop iterates over an inclusive numeric range:

for START..END {
    // statements
}

Both START and END must be integer literals. The range is inclusive, meaning the body executes END - START + 1 times.

for 1..5 {
    // executes 5 times
}

for 0..9 {
    // executes 10 times
}

For loops are commonly used to query an LLM multiple times and collect responses:

let responses = [];

for 1..20 {
    let output = query_model(my_model, "Is AI beneficial?", {"topic": "ai"});
    append responses with output;
}

Append statement¶

The append statement adds a value to the end of a list:

append LIST_NAME with EXPRESSION;

If the variable does not exist yet, it is automatically created as an empty list before the value is appended.

let results = [];
append results with "first";
append results with "second";
// results is ["first", "second"]

This is the primary way to build up collections during loop iterations:

let all_scores = [];

for 1..10 {
    let score = accuracy(ground_truth, predictions);
    append all_scores with score;
}

Return statement¶

The return statement exits a function and provides its result value:

return EXPRESSION;

declare compute_mean as function(data) {
    let result = mean(data);
    return result;
}

If a function does not contain a return statement, it returns the last value left on the evaluation stack.