In lesson 9. Adding and subtracting, the final question before practice, you do not know what's in var amount. It could be negative and add to the health with a '-' (minus) sign.
For example:
var amount = -30
var health = 70
health -= amount
Would technically increase health.
In lesson 9. Adding and subtracting, the final question before practice, you do not know what's in var amount. It could be negative and add to the health with a '-' (minus) sign.
For example:
var amount = -30
var health = 70
health -= amount
Would technically increase health.