What does the ^ (caret) symbol do in JavaScript?
Solution 1:
The ^
operator is the bitwise XOR operator. To square a value, use Math.pow
:
var altura2 = Math.pow($('#ddl_altura').attr("value")/100, 2);
Solution 2:
^
is performing exclusive OR (XOR), for instance
6
is 110
in binary, 3
is 011
in binary, and
6 ^ 3
, meaning 110 XOR 011
gives 101 (5).
110 since 0 ^ 0 => 0
011 0 ^ 1 => 1
--- 1 ^ 0 => 1
101 1 ^ 1 => 0
Math.pow(x,2) calculates x²
but for square you better use x*x
as Math.pow uses logarithms and you get more approximations errors. ( x² ~ exp(2.log(x))
)
Solution 3:
This is the bitwise XOR operator.
Solution 4:
Its called bitwise XOR. Let me explain it:
You have :
Decimal Binary
0 0
1 01
2 10
3 11
Now we want 3^2=
?
then we have 11^10=?
11
10
---
01
---
so 11^10=01
01
in Decimal is 1
.
So we can say that 3^2=1;
Solution 5:
The bitwise XOR operator is indicated by a caret ( ^ ) and, of course, works directly on the binary form of numbers. Bitwise XOR is different from bitwise OR in that it returns 1 only when exactly one bit has a value of 1.
Source: http://www.java-samples.com/showtutorial.php?tutorialid=820