Left Shift(<<)
It is a binary operator that takes two numbers, left shifts the bits of the first operand, and the second operand decides the number of places to shift. In other words, left-shifting an integer “a” with an integer “b” denoted as ‘(a<<b)’ is equivalent to multiplying a with 2^b (2 raised to power b).
Syntax:
a << b;
- a: First Operand
- b: Second Operand
Example: Let’s take a=5; which is 101 in Binary Form. Now, if “a is left-shifted by 2” i.e a=a<<2 then a will become a=a*(2^2). Thus, a=5*(2^2)=20 which can be written as 10100.
C
// C Program to demonstrate use// of left shift operator#include <stdio.h>// Driver codeint main(){ // a = 5(00000101), b = 9(00001001) unsigned char a = 5, b = 9; // The result is 00001010 printf("a<<1 = %d\n", (a << 1)); // The result is 00010010 printf("b<<1 = %d", (b << 1)); return 0;} |
C++
// C++ Program to demonstrate use// of left shift operator#include <iostream>using namespace std;// Driver codeint main(){ // a = 5(00000101), b = 9(00001001) unsigned char a = 5, b = 9; // The result is 00001010 cout << "a<<1 = " << (a << 1) << endl; // The result is 00010010 cout << "b<<1 = " << (b << 1) << endl; return 0;} |
Output
a<<1 = 10 b<<1 = 18
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