What does += mean in Ruby?

Question

Possible Duplicate:
What does “+=” (plus equals) mean?

What is the point of sum += square below? What does it mean?

sum = 0
[1, 2, 3, 4].each do |value|
  square = value * value
  sum += square
end
puts sum

score 8 · Accepted Answer · answered Apr 28 '10 at 11:21

8

sum = sum + square

answered Apr 28 '10 at 11:21

vladv

score 1 · Answer 2 · edited Sep 24 '12 at 02:21

1

For example:

sum=4 
sum += 5  #9

edited Sep 24 '12 at 02:21

the Tin Man

answered Apr 28 '10 at 11:23

Salil

score 0 · Answer 3 · edited Sep 24 '12 at 01:45

0

I suggest you read up "Pragmatic Programmer's Guide to Ruby". Very nice explanation of Ruby concepts for beginners.

edited Sep 24 '12 at 01:45

Austin Henley

answered Sep 23 '12 at 10:16

JunaidKirkire

3 Answers3