What does a single | or & mean?

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What is the diffference between the | and || or operators?
What does | (pipe) mean in c#?

I have some code that was written by another developer in the office, who isn't in at the moment. I have some work to do on his code, but I have not coma across this before. I tried searching on here, but it strips my | out of the search line. I also don't know what the name for that symbol is, so couldn't search for it like that.

this.Action.Values[key] = (int)this.Action.Values[key] | 1;

My question is what does the single or do in this instance?

bitwise 'or' and bitwise 'and' http://en.wikipedia.org/wiki/Bitwise_operation — kenny, Mar 16 '12 at 11:57
Apologies for the duplicate post, as I mentioned in the question the search box on this site strips out the | symbol. — Andrew, Mar 16 '12 at 11:59

Moo-Juice · Accepted Answer · 2013-06-12T07:47:35.617

The Bar (or pipe), | is a bit-wise OR operator, and the easiest way of explaining it is that it allows us to combine flags. Consider:

[Flags]
public enum WindowFlags
{
    None = 0, 
    Movable = 1,
    HasCloseBox = 2,
    HasMinimizeBox = 4,
    HasMaximizeBox = 8
}

Using the bitwise-OR operator, we can combine flags, thusly:

WindowFlags flags = WindowFlags .Movable | WindowFlags .HasCloseBox | WindowFlags .HasMinimizeBox;

We can "test" for a given flag, using:

bool isMovable = (flags & WindowFlags .Movable);

Removing flags is a bit more of a strain on the eyeballs:

flags &= ~WindowFlags.HasCloseBox;  // remove HasCloseBox flag

score 4 · Answer 2 · answered Mar 16 '12 at 11:58

4

These are bitwise operations.

Example

  011000101
| 100100100
-----------
= 111100101


  011000101
& 100100100
-----------
= 000000100

answered Mar 16 '12 at 11:58

bytecode77

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score 1 · Answer 3 · answered Mar 16 '12 at 11:57

This operator mean just OR.

Binary | operators are predefined for the integral types and bool. For integral types, | computes the bitwise OR of its operands. For bool operands, | computes the logical OR of its operands; that is, the result is false if and only if both its operands are false.

Reference here

See all the operators here in c#

score 1 · Answer 4 · answered Mar 16 '12 at 11:57

1

http://en.wikipedia.org/wiki/Bitwise_operation

& = bitwise AND | = bitwise OR

answered Mar 16 '12 at 11:57

ChrisB

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score 1 · Answer 5 · edited Mar 17 '12 at 08:42

1

| --> logical/bitwise OR

& -- > logical/bitwise AND

edited Mar 17 '12 at 08:42

Code Lღver

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answered Mar 16 '12 at 11:57

J...

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score 1 · Answer 6 · answered Mar 16 '12 at 11:58

1

I believe that's a bitwise operator. See http://en.wikipedia.org/wiki/Bitwise_operation.

answered Mar 16 '12 at 11:58

nootskej

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score 1 · Answer 7 · answered Mar 16 '12 at 11:58

1

The pipe "|" is a bitwise or operator: http://msdn.microsoft.com/en-us/library/kxszd0kx.aspx

answered Mar 16 '12 at 11:58

David Brabant

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score 1 · Answer 8 · answered Mar 16 '12 at 11:59

Binary | operators are predefined for the integral types and bool. For integral types, | computes the bitwise OR of its operands. For bool operands, | computes the logical OR of its operands; that is, the result is false if and only if both its operands are false.

http://msdn.microsoft.com/en-us/library/kxszd0kx(v=vs.100).aspx

score 1 · Answer 9 · answered Mar 16 '12 at 11:59

1

A single | is bitwise OR operator

answered Mar 16 '12 at 11:59

ionden

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What does a single | or & mean?

9 Answers9

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