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

What is meant by high-order and low-order bytes?
Lower order and higher-order bytes are the terms used while computing calculations in a programming language. Usually, numbers are written from left to right. The left is the most significant bit, and...
Vishal
0 0
9
Is C programming necessary to learn to become a software engineer?
C language is starting language for programming, if you will understand the concept of C language then it would be very easy to learn all programming language because somehow concepts are similar
Ujwalajagdale
0 0
7
What is the most efficient way to store flag values?
A flag is a value used to make a decision between two or more options in the execution of a program. Efficiency in this case is a tradeoff between size and speed. The most memory-space efficient way to...
Deepak
0 0
6
What are the applications of C programming?
Hi Poulami Hope you are doing good. C programming language is a versatile and widely used language that has found applications in various domains. Some of the key applications of C programming include: 1....
Poulomi
0 0
6
How and where do I start learning C programming?
C language is the basic of the programming to learn the basic of programming we learn the c language
Gaurav
0 0
7

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

Ask a Question

Related Lessons

Do You Know How Is Size Of Structure Defined?
Size of the structure is defined based on multiplies of bigger data type member in the structure. Example: If a structure contains integer, char, short data type, then size of the Structure will be multiples...

Umasankar Natarajan

0 0
0
Introduction to Programming Languages
What is a Programming Language? A programming language is a formal computer language or constructed language designed to communicate instructions to a machine, particularly a computer. Programming languages...

Clevigour Solutions

2 0
1
C Program-String Palindrome
//Header files #include<stdio.h>#include<conio.h>#include<string.h> //Main function void main(){ char mystring; int i,length; int flag=0; //Function for clearing screen clrscr();...
S

Salim Ahmed Ansari

0 0
0
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
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

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 >

Why Should you Become an IT Consultant

Information technology consultancy or Information technology consulting is a specialized field in which one can set their focus on providing advisory services to business firms on finding ways to use innovations in information technology to further their business and meet the objectives of the business. Not only does...

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 >

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