# Concatenate First and Last Name into One String
by Helen Yu
tags: strings, formatting

## Summary
> Given two strings, firstName and lastName, return a single string in the format "last, first".
> Examples
> concatName("First", "Last") ➞ "Last, First"
> concatName("John", "Doe") ➞ "Doe, John"
> concatName("Mary", "Jane") ➞ "Jane, Mary"
> Notes
> Don't forget to return the result.
> If you get stuck on a challenge, find help in the Resources tab.
> If you're really stuck

## Instructions
Given two strings, `firstName` and `lastName`, return a single string in the format "last, first".

### Examples
```
concatName("First", "Last") ➞ "Last, First"

concatName("John", "Doe") ➞ "Doe, John"

concatName("Mary", "Jane") ➞ "Jane, Mary"
```

### Notes
- Don't forget to `return` the result.
- If you get stuck on a challenge, find help in the **Resources** tab.
- If you're *really* stuck, unlock solutions in the **Solutions** tab.