---
id: 5d792533bb38fab70b27f527
title: Part 016
challengeType: 0
isBeta: true
---
## Description
`arg1` and `arg2` are the numbers input by the user in a string such as "1+3".
Pass `parseFloat(arg1)` and `parseFloat(arg2)` as the arguments to `infixToFunction[fn]` (remember `infixToFunction[fn]` is a function).
## Instructions
## Tests
```yml
tests:
- text: See description above for instructions.
testString: const regex = /([0-9.]+)([+-\/*])([0-9.]+)/; assert(infixEval("23+35", regex) === "58" && infixEval("100-20", regex) === "80" && infixEval("10*10", regex) === "100" && infixEval("120/6", regex) === "20");
```
## Challenge Seed
```html
```
### Before Test
### After Test
```html
```
## Solution