What does the |= Operator mean?

Question

In some code i found this |= operator used to return a uint but i can find something about it on the internet and i wanna understand how it works and what are the return values in this case.

public uint Mask { get { uint num = 0; if (_0) num |= 1U; if (_1) num |= 2U; if (_2) num |= 4U; return num; } }

a detailed answer will be much appreciated.

msdn.microsoft.com/en-us/library/h5f1zzaw.aspx perhaps this link will help — Bojan B
– Bojan B, Commented Nov 15, 2016 at 9:12
It's the binary OR combined with an assignment. Like += or -=. — Lennart
– Lennart, Commented Nov 15, 2016 at 9:12
Possible duplicate of what does |= (single pipe equal) and &=(single ampersand equal) mean — Thilo
– Thilo, Commented Nov 15, 2016 at 9:13

LordWilmore · Accepted Answer · 2016-11-15 09:15:37Z

29

You know how x += 1 means x = x + 1, well x |= 1 means x = x | 1. Of course | means bitwise OR.

edited Nov 15, 2016 at 9:15

answered Nov 15, 2016 at 9:12

LordWilmore

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1 Comment

Daniel Eugen Over a year ago

i wasn't expecting that, what a shame :D. thanks for your answer dude.

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