C# & operator clarification
Solution 1
The ampersand does bitwise AND on the integers in their binary representations. The pipe does bitwise OR.
See here what those bitwise operations mean: http://en.wikipedia.org/wiki/Bitwise_operation
Solution 2
The &&
is a conditional and used in if
statements and while
if(x>1 && y<3)
this means that x should be greater than 1 and y less than 3, satisfy both conditions
if(x>1 || y<3)
satisfy one of them
However, & and | are bitwise AND and OR respectively. ex:
1 | 0 => 1
1 & 0 => 0
1 & 1 => 1
if this apply for straight integers, their corresponding binary value will be calculated and applied
2&1
=> 10 // the binary value of 2
&
01 // the binary value of 1
--
00 // the result is zero
Solution 3
& and | is bit operations. You must use it on bit masks. && and || is logical operations so you can use it for only bool values.
Example of bit operation:
var a = 1;
var b = 2;
var c = a|b;
in binary format this means a = 00000001, b = 00000010 c = 00000011
So if you use bitmask c it will pass values 1, 2 or 3.
Solution 4
One more difference is that & operator computes the logical bitwise AND of its operands, if operands are not bool (integer in your case)
Solution 5
& operator is BItwise AND
operator,it does manipulation on bits.
e.g. 5 & 3
0101 //5
0011 //3
----------
5&3= 0001 //1
| operator is BItwise OR
operator,it does manipulation on bits.
5|3
0101 //5
0011 //3
----------
5|3= 0111 //7
&&
operator is logical AND operator
- it returns true if all conditions are true
e.g.
if((3>5)&&(3>4)) //returns true
if((6>5)&&(3>4)) //returns false
||
operator is logical OR operator
- it returns true if one of the conditions is true
e.g.
if((3>5)||(3>4)) //returns true
if((6>5)||(3>4)) //returns true
if((6>5)||(5>4)) //returns false
Sunscreen
Updated on June 04, 2022Comments
-
Sunscreen almost 2 years
I saw a couple of questions here about the diference between && and & operators in C#, but I am still confused how it is used, and what outcome results in different situations. For example I just glimpsed the following code in a project
bMyBoolean = Convert.ToBoolean(nMyInt & 1); bMyBoolean = Convert.ToBoolean(nMyInt & 2);
When it will result 0 and when >0? What is the logic behind this operator? What are the diferences between the operator '|'?
bMyBoolean = Convert.ToBoolean(nMyInt | 1); bMyBoolean = Convert.ToBoolean(nMyInt | 2);
Can we use the &&, || operators and get the same results (possibly with different code)?
-
svick over 11 yearsI think this doesn't explain the difference well. What happens when you use
&
on booleans? What happens when you use&&
on integers? -
Alisson Reinaldo Silva over 6 yearsIf anyone wants to know why
10 & 01 == 00
, you may understand how bitwase operations are done here.