# Basic 1

In this section, you will find a step by step to manipulate basic inputs on Ritchie.

# Basic 1: Inputs

## Objective

On this tutorial, the idea is to teach you how to create a formula on Ritchie that will sum two positive numbers.

## Inputs

This formula needs to contain (at least) those two inputs parameters, see below:

1. Number one (`RIT_NUMBER_ONE`).
2. Number two (`RIT_NUMBER_TWO`).

## Step by step

The formula needs to follow the next steps:

1. Extract all inputs parameters.
2. Convert inputs to integers (there is currently no integer `type` in inputs config.json file).
3. Sum both numbers.
4. Return the result on the terminal.

## Improvement suggestions

If you want to play a little more, here are some suggestions:

• Add a validation of the input parameters to return an error to the user if the parameter is not an integer.
• Allow the user to sum negative numbers with positive ones.
• Allow the user to digit decimals in addition to integers.

## Next steps

👉 If you’ve completed the first tutorial, let’s go to the basic 2 task!