What does this line mean ?

[Jark]

I found this line of code while working on Perlin noise:

n = (n<<13) ^ n

It's C, I guess, and I can't guess how to translate that into Basic...

Can anybody help ?

[R@dioman]

hmmm, I've never seen that syntax. Perhaps it's a typo. It probably means:
n=(n<13)^n
which means n=n^n if n < 13
But I also don't know too much C, so I could be wrong.

[Jark]

The line comes from Hugo Elias webpage. It was copied and copied on other pages, and the syntax is always the same...

[Agamemnus]

Coming from nathan's reply in the challenge forum, it should be:

2^n^13^n......

My C++ book says it is a bitwise left shift...

[Jark]

Thanks Aga, I'm gonna try to apply that... It's included in a random number generator.

[Agamemnus]

I'm not sure how exactly to translate it, though......

[Antoni Gual]

Hugo Elias uses to put pseudocode at his page, not any known language...

[red_Marvin]

you can use "<<" and ">>" in c++ afaik but I don't know what they
do...

[Shogun]

I think it is for shifting bytes as it was said above. Although byte shifting is somthing I really should look more into....along with linked lists....

[Plasma]

Yes, it's a bit shift...

Code:

n = (n * 2^13) ^ n
n = (n * 8192) ^ n