JavaScript according to position and computing symbol (& amp;) use introduction

Copy code code as follows:

result = [Interaction 1] & [Interal 1]

& Perform each bit of two 32 -bit expressions "and" with "operations. If both bits are 1, the result is 1. Otherwise, the result is 0.

Copy code code as follows:

// 9 binary is 1001, and 32 -bit is 000000000000000000000000001001

var expr1 = 9;

// 5 is 000000000000000000000000000101

var expr2 = 5;

/*

0000000000000000000000001001

&

0000000000000000000000000101

=

0000000000000000000000000001

=

1

*/

var result = expr1 & expr2;

alert (result);

// Plug it [1]

expr1 & = expr2;

alert (expr1);

// Plug it [1]