---
id: 5d79253297c0ebb149ea9fed
title: Part 1
challengeType: 0
isHidden: true
---
## Description
In functional programming, we prefer immutable values over mutable values.
Mutable values (declared with var or `let`) can lead to unexpected behaviors and bugs. Values declared with `const` cannot be reassigned, which makes using them easier because you don't have to keep track of their values.
Start by creating an empty `infixToFunction` object using `const`.
## Instructions
## Tests
```yml
tests:
- text: See description above for instructions.
testString: assert(code.replace(/\s/g, "").includes("constinfixToFunction={}"));
```
## Challenge Seed
```html
```
### Before Test
### After Test
```html
```
## Solution