PHP - Bitwise left shift: <<

Bit shift to the left as many time shifts the input number to the left as many as the value of the second input. output bits will be lost and the input bits will be 0. bit shift to the left can be used to multiply the power of 2. for example, when 8 is shifted twice the result is 32, it is the same as if multiplied 8 with two on second that is four and 4 multiplied with 8 is 32.

<<

Description

par1 << par2

Used keywords: <<

Input

par1 - Any integer
par2 - Any integer

Output

Result - Integers

Examples

PHP

Bitwise left shift the possible of use:

$x = 16 << 2;      // x = 64
$y = 0xf << 5;     // y = 480
$z = ($x << $y) << 2;// z = 256

PHP

Even one example in what situations we can use the operation bitwise left shift:

$i << 4
0x12AB << $j
128 << ($j <<(3 + $i))

PHP

Other pieces of example codes:

2 << 2

You can find it in the following collections: bitwise operators

Bitwise left shift in another programming language:

Differences to: