Is there any reason to use bitwise operations such as 'n<< 1' rather than just 'n * 2'? Isn't the compiler in charge of such optimizations?

Asked by Last Modified  

2 Answers

Learn C Language +3 C Language Programming Advanced C++ Basic C++

Follow 2
Answer

Please enter your answer

Avinash Patel

Yes, its better to use bitwise operations. But this also depends on the programmers context of use because with modern compilers on modern architectures, there is generally no difference in performance.
Comments
Dislike Bookmark

C++ Pro . I talk to robots in C++. Data Structures. IT Professional Trainer

Well, you have already answered your question. Since you know n<<1 is already an optimized version of n*2. So basically if you use this in your code, there wont be any further conversion from n*2 to n<<1. And yes, Compiler may do such optimization but if you already using it in your code...
read more
Well, you have already answered your question. Since you know n<<1 is already an optimized version of n*2. So basically if you use this in your code, there wont be any further conversion from n*2 to n<<1. And yes, Compiler may do such optimization but if you already using it in your code before hand, your program will run faster. read less
Comments
Dislike Bookmark

Related Questions

Is it necessary to mention the header files in the C programming language?
It is absolutely necessary as without inclusion of the same to your program, will lead to the absence of library functions that are present in the header files, your program will have a syntax error.
Hari
What is the fee for learning C Language?
In C lang course ,there is not only basics it also having whole package to complete the task and course.cost may be it's depends upon the institute n teaching level
Sk.
Why are C and C++ faster than other programming languages?
C is basic programming language. It is very simple language & interested. C is procedural programming language
Kalyani
0 0
8
Write a programme to swap two numbers with out using a third variable and by using bitwise op-erators.
main(){ int a=5,b=10; printf("\r Before Swap"); printf("\r a=%d and b=%d",a,b); a^=b^=a^=b; printf("\r After Swap"); printf("\r a=%d and b=%d",a,b); return 0; }
Ranjeeth
What is = and == in C language?
'=' (Assignment Operator): The single equal sign = is used as an assignment operator. It is used to assign a value to a variable. '==' (Equality Operator): The double equal sign == is used as a relational...
Sayed
0 0
9

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Variables
Variables in C Language:A variable is a name that may be used to store a data value. Unlike constant, variables are changeable, we can change value of a variable during execution of a program. A programmer...

Venkateswararao S.

0 0
0
Operators in C
Operators in C Operator: An operator is a symbol that tells the compiler to perform certain mathematical or logical calculations. Operators are used in programs to manipulate data and variables. The...

Venkateswararao S.

0 0
0
C PROGRAM FOR GENERATING SOUND
#include<stdio.h> #include<conio.h> #include<dos.h> void main() { sound(3000); // sound function have single parameter , this parameter we put integer value its generating...

V. Muthu Ganeshan

0 0
0
C and C++ programming with memory level debugging
Understanding C and C++ programming by using memory level debugging. Step 1: Understand the Memory map of C executable Step 2: Start memory level debugging using popular IDE Step 3: Find the memory...

Umasankar Natarajan

0 0
0
How to write shared library program using C Programming?
Library Name : hellofilename : hello.c#include void Hello(){ printf("Hello World .. How are you 1\n");}======================================Header File:hello.h#ifndef __HELLO_H#define __HELLO_Hvoid Hello(void);#endif===============================Application...

Sankar S

0 0
0

Recommended Articles

Brilliant Academy, a reputed B. Tech Tuition...

Brilliant Academy is one of the reputed institutes for B.Tech tuition classes. This institute is specialised in delivering quality tuition classes for B.E, Engineering - all streams and Engineering diploma courses. Incorporated in 2012, Brillant Academy is a brainchild of Mr Jagadeesh. The main motto of the academy is to...

Read full article >

Lasya Infotech: An educational Training...

Lasya Infotech is a Hyderabad based IT training institute founded in 2016 by O Venkat. Believing in his innovation, passion and persistence and with a diverse blend of experience, he started his brainchild to deliver exemplary professional courses to aspiring candidates by honing their skills. Ever since the institute envisions...

Read full article >

Learn Hadoop and Big Data

Hadoop is a framework which has been developed for organizing and analysing big chunks of data for a business. Suppose you have a file larger than your system’s storage capacity and you can’t store it. Hadoop helps in storing bigger files than what could be stored on one particular server. You can therefore store very,...

Read full article >

Learn Microsoft Excel

Microsoft Excel is an electronic spreadsheet tool which is commonly used for financial and statistical data processing. It has been developed by Microsoft and forms a major component of the widely used Microsoft Office. From individual users to the top IT companies, Excel is used worldwide. Excel is one of the most important...

Read full article >

Find C Language Classes near you
C Language Classes in Bangalore
C Language Classes in Hyderabad
C Language Classes in Delhi
C Language Classes in Pune
C Language Classes in Chennai
C Language Classes in Mumbai
C Language Classes in Kolkata
C Language Classes in Noida
C Language Classes in Ghaziabad
C Language Classes in Gurgaon

Looking for C Language Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you