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Overview

Latitude allows you to add logic to your prompts, making them more dynamic and flexible. This guide covers two main logical constructs: conditional statements (if) and loops (each).

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Conditional Statements (if)

Conditional statements allow you to execute different parts of your prompt based on certain conditions.

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Basic Syntax

    {{#if condition}}
        // Content to be rendered if the condition is true
    {{/if}}

For more complex scenarios, you can use else and else if:

    {{#if condition1}}
        // Content if condition1 is true
    {{:else if condition2}}
        // Content if condition2 is true
    {{:else}}
        // Content if all conditions are false
    {{/if}}

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Using Variables in Conditions

You can use variables in your conditions. These variables can come from parameters or be set within the prompt:

    {{#if user_age >= 18}}
        You are eligible to vote.
    {{:else}}
        You are not old enough to vote yet.
    {{/if}}

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Using Step Responses

You can use the response from a step in your conditions. First, save the step response to a variable:

    <response as="variable_response">Is the user a premium member?</response>

    {{#if variable_response == 'Yes'}}
        Welcome, premium member! Here are your exclusive benefits:
        1. Priority support
        Ad-free experience
        Early access to new features
    {{:else}}
        Welcome! Consider upgrading to our premium membership for additional benefits.
    {{/if}}

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Loops (each)

The each statement allows you to iterate over arrays or objects in your prompts.

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Basic Syntax

    {{#each items as item}}
        // Content to be repeated for each item
    {{/each}}

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Example Usage

    {{#each ['apple', 'banana', 'cherry'] as fruit}}
        {{fruit}}
    {{/each}}

This will output:

  • apple
  • banana
  • cherry

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Using the Index

You can also access the index of the current item in the loop:

    {{#each ['a', 'b', 'c'] as letter, index}}
        {{index + 1}}.{{letter}}
    {{/each}}

This will output:

  • 1.a
  • 2.b
  • 3.c

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Conditional Rendering within Loops

You can combine each with if for more complex logic:

    {{#each users as user}}
        {{#if user.isActive}}
            {{user.name}} is an active user.
        {{:else}}
            {{user.name}} is not currently active.
        {{/if}}
    {{/each}}

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Empty List Handling

You can provide an alternative output when the list is empty:

    {{#each items as item}}
        {{item}}
    {{:else}}
        No items found.
    {{/each}}
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