First things first, log into your Xano dashboard. Once you're in, head over to the left sidebar and click on "Libraries" under the "API" section.

In the Libraries section, you'll find a bunch of built-in libraries for common tasks. These include "String Operations", "Date and Time", "Math Operations", and more. Take a moment to get to know these libraries and what they can do for you.

Click on the "String Operations" library to handle tasks like concatenation, slicing, or changing the case of strings. Pick the function you need, like "concat" to join strings together, and add it to your logic flow. Then, set up the input parameters, like the strings you want to concatenate.

For anything date and time-related, go to the "Date and Time" library. You'll find functions like "formatDate", "addDays", and "getCurrentTime". Choose the function you need and add it to your flow. Enter the required date format or the number of days to add, depending on what you're doing.

Head over to the "Math Operations" library for arithmetic tasks. Functions like "add", "subtract", "multiply", and "divide" are at your disposal. Add the function you need to your logic flow and provide the necessary numbers.

To add some conditional logic, go to the "Conditional Logic" library. Functions like "ifExists", "ifEqual", or "ifGreaterThan" let you create complex logic. Insert the function you need into your flow and set up the conditions and outputs.

Once you've set up the libraries and their functions, save your changes. Go to the "API" section and test the endpoint to make sure everything works as expected. Use the built-in testing tool to check the output of your functions.

Finally, integrate your logic into an API endpoint. Go back to the "API" section, select or create an endpoint, and insert your predefined logic with the library functions. Save and test the endpoint again to ensure everything runs smoothly.