UrbanPro
Login Ask & Answer Success Stories Paid Courses Free Classes Tuition & Classes Fees Write a Review All Categories Help Center
Post your Learning Need Signup as a Tutor
✕

Popular Cities

Bangalore

Hyderabad

Delhi

Mumbai

Chennai

Pune

Kolkata

Gurgaon

Ahmedabad

Jaipur

Noida

✕

Learn C Language from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Book a Free Demo

C Language > Learn C Language > What are 'macros' and 'constants' used for in C?
✕

Search in

What are 'macros' and 'constants' used for in C?

Asked by Last Modified  

2 Answers

Learn C Language

Follow 2
Answer

Please enter your answer

Experienced Computer trainer having worked in IT sector for 20 years.

The const keyword causes the identifier size to be allocated in the read-only memory. This means that the value of the identifier can not be changed by the executing program. MACROS are efficient than the const statements as they are not given any memory, being more Readable and Faster in execution!
Comments
Dislike Bookmark

+46-768394959 (Whatsapp number) please reach me on this number

Macros: Macros are defined using the #define preprocessor directive. They are not variables; instead, they are symbolic constants. Macros are replaced by their values at compile-time through a process called macro expansion. Macros can include code and perform text substitution. They are processed...
read more

Macros:

  • Macros are defined using the #define preprocessor directive. They are not variables; instead, they are symbolic constants.
  • Macros are replaced by their values at compile-time through a process called macro expansion.
  • Macros can include code and perform text substitution. They are processed by the preprocessor before the actual compilation of the code.
  • Macros can be used to create reusable code snippets, conditional compilation, or to define constants with complex expressions.

    Constants:

    • Constants are variables that are declared as read-only, and their values cannot be changed during the program's execution.
    • In C, you can define constants using the const keyword. These are typically used for values that should not change throughout the program.
    • Constants are stored in memory, and their values are accessed like regular variables.
read less
Comments
Dislike Bookmark

Related Questions

Why does execution of a program in C/C++/Java start from only main?
Main function is calling the other functions of he program and compiler gets this direction while Compiling the code. If it does not find main function then it will also not find the other functions in the code. So, main is required in C program.
Isha
What will the pre-processor do for a program?
The pre processor takes a look at your source code just before it goes off to the compiler, does a little formatting, and carries out any instructions you have given it. Each # command that the preprocessor...
Neel
0 0
6
Why C language is still available in market, while so many & much easier languages are available ?
Now, I agree that you can use OOP in C to some extent, but it's sort of painful and inelegant (well at least compared to C++ I guess). So, what makes C so popular? Is it efficiency; being low-level; the...
Pankaj
Can I learn C and C++ by watching videos? If it is possible, what is the best channel?
Yes!! you can learn.but the concept won't be clear up the mark,since there is no one to guide while you are doing some programs.you might have observed these things.There are no such online tutorial that...
Mohammad
0 0
5
What is the structure of a C program?
It typically consists of sections such as preprocessor directives, global variable declarations, function prototypes, the main function, and user-defined functions. A clear structure ensures logical flow,...
Snehal
0 0
5

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

Ask a Question

Related Lessons

Storage classes in c
Storage classes determine the scope and life time of a variable. Scope is defined as the region over which the defined variable is accessible. Lifetime is the time during which the value of a variable...

Swetha K.

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
Software Development Training In Jaipur
Satyam Web Solution provides website designing &development and software designing &development training in Jaipur for various stream’s students. MCA 6 month Industrial Training/Internship B....

Satyam Web Solution Project Training

1 0
0
Can we store different data types in a stack?
Yesterday, one of my Facebook friend asked me this question. My answer is "yes", and in this post I will discuss how could we do this.I am a great supporter of working with unions and I will be using union...

Shiladitya Munshi

0 0
0
Programming in C/C++ (demo)

K. Kumar

0 0
0

Recommended Articles

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 >

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 >

Make a Career as a BPO Professional

Business Process outsourcing (BPO) services can be considered as a kind of outsourcing which involves subletting of specific functions associated with any business to a third party service provider. BPO is usually administered as a cost-saving procedure for functions which an organization needs but does not rely upon to...

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 Ahmedabad
C Language Classes in Noida
C Language Classes in Jaipur

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
X

Looking for C Language Classes?

The best tutors for C Language Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Learn C Language with the Best Tutors

The best Tutors for C Language Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more

ThinkVidya Learning Pvt Ltd © 2010-2024All Rights Reserved