Bitwise XOR operator c# and javascript [duplicate]

Question

There is code on javascript

const a = 2654435769;        
const b = 7562089;        
console.log(a ^ b); // answer -1639703856

When you try to rewrite this code on C #, I ran into a problem.

long a = 2654435769;
long b = 7562089;
var result = a ^ b; // result = 2655263440;

Why do you get answers in different languages? And how to get the same answer on C # on JavaScript

Probably by using an int instead of a long (don't know C#). JS uses 32bit signed integer bitwise operations. — Jonas Wilms
– Jonas Wilms, Commented Aug 28, 2021 at 21:30
It's a bitwise XOR operator, not a logical XOR operator. Javascript converts numbers into signed 32-bit integers to perform bitwise operators. — President James K. Polk
– President James K. Polk, Commented Aug 28, 2021 at 21:33

dee-see · Accepted Answer · 2021-08-28 21:45:55Z

3

The ECMAScript Specification describes that for all bitwise operations on numbers, they will be converted to 32 bit integers before applying the operator. To obtain the same result in C# you can cast your operands to int:

long a = 2654435769;
long b = 7562089;
var result = (int)a ^ (int)b; // result = -1639703856;

Relevant bits from the spec in case the link goes stale in the future:

edited Aug 28, 2021 at 21:45

answered Aug 28, 2021 at 21:42

dee-see

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