Unfamiliar characters used in JavaScript encryption script

Question

Here is an excerpt from a JS encryption script that I am studying.

function permutationGenerator(nNumElements) {
    this.nNumElements     = nNumElements;
           


        

Answer 1

<< is a bitwise left shift. >> is a bitwise right shift. | is a bitwise OR. & is a bitwise AND. Please see this reference for more information.