--- id: 5d6904b6e0696bdec46938f2 title: Part 51 challengeType: 0 isBeta: true --- ## Description
There is a shorthand way to add or subtract from a variable called compound assignment. The long way to add to a variable is `num = num + 5`. The shorthand way is `num += 5`. It works the same way with subtraction. Update both lines inside the `buyHealth` function to use compound assignment.
## Instructions
## Tests
```yml tests: - text: See description above for instructions. testString: assert(buyHealth.toString().match(/gold\s*\-\=\s*10\;?/) && buyHealth.toString().match(/health\s*\+\=\s*10\;?/)); ```
## Challenge Seed
```html ```
### Before Test
```html RPG - Dragon Repeller
XP: 0 Health: 100 Gold: 50
Monster Name: Health:
Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
```
### After Test
```html ```
## Solution
```html ```