It sets the value on the left to be itself plus the value on the right (for example, i+=3 is the same as i = i+3). It’s called the addition-assignment operator.
What does the += operator do?
Frequently googled questions
An introduction to a new series of posts which I will be running relatively frequently answering some of the more obscure google search terms which cause people to land on slightlymore. The posts won’t appear in the normal blog section, they’ll just appear in the fgq section.
