# Level 1: Inputs

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

# Objective

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

Command suggestion: `rit math sum 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.

Well done! You've completed the first task!

# 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 challenge, let's go to the level 2 task!