UrbanPro

Learn C Language from the Best Tutors

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

Search in

What is the algorithm to be used to swap two numbers without using a temporary variable?

Asked by Last Modified  

Follow 2
Answer

Please enter your answer

MCA, guiding and tutoring Computer Science and Applications 2012

There are various ways using operators and expressions. The simplest way is always recommended with some physical world scenarios. As you asked for algorithm only. Declare and initialize two variables first, second Step 1 → Add first and second and store to first Step 2 → Subtract second...
read more

There are various ways using operators and expressions. The simplest way is always recommended with some physical world scenarios. 

As you asked for algorithm only.

Declare and initialize two variables first, second

Step 1 → Add first  and second and store to first

Step 2 → Subtract second from first and store to second

Step 3 → Subtract second from first and store to first

Swap completed.

Insight: 

Assuming variable having value first=10 and second=20

Now adding first with second and storing the result 10+20=30 in first.

Now subtracting the second which is still 10 from first and storing the result 30-10=20 in second

Here we achieved the initial swap

Then subtracting second which is 20 from first 30-20=10 and storing the result in first complene the final swap as now value inside variable first is 10 and second is 20.

Thank you

read less
Comments

Related Questions

What is the use of getch(); in the end of c program
getch() is used to hold the console(output) window on the screen after the whole program run is completed till the user enters a key from keyboard. However, the character entered is not displayed on screen....
Priyanka
any one can teach me c++
Yes of course i can give you online classes
Bhuvanesh
How can I learn C easily and rapidly?
You can learn C by three ways 1. Practise 10 programs daily for 10 days. 2. Understand the programming concept before going to make an attempt 3. Try to do some simple projects on your own will improve your skills rapidly.
Umamahesh
0 0
5
Why is a compiler used for language C and not an interpreter?
C is a structured programming language. It’s code consists of many macros, function calls references etc., which is required to be decoded before program’s execution can take place, so that any error is...
Savitha
0 0
5
What is = and == in C language?
= is assignment operator while ==is comparision operator
Sayed
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

C Program-Infinite Loop[For] Demo
//Header Files #include<stdio.h>#include<conio.h> //Main function void main(){ //Function for clearing screen clrscr(); //Infinite for loop for(;;) { printf("Hello!"); } //Function for...
S

Functions In C Programming
A C-language program is nothing but collection of Function, these are the building blocks of a ‘C’ program. Generally, a function mans a task. “Function is a...

An Interesting discussion about malloc( ) and calloc( )
What are malloc( ) and calloc( )? Simply putting they are the predefined functions in C language. Malloc( ) and calloc( ) are two such functions which are used for more or less identical purpose and...

Pro learners tip for C language
First get the concept of algorithm before heading to write your first program.

C Program-Upper Case Demo
/*WAP to print the character entered by user in upper case*/ //Header files #include<stdio.h>#include<conio.h> //Main function void main(){ char ch; //Function for clearing screen clrscr(); ...
S

Recommended Articles

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 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 >

Almost all of us, inside the pocket, bag or on the table have a mobile phone, out of which 90% of us have a smartphone. The technology is advancing rapidly. When it comes to mobile phones, people today want much more than just making phone calls and playing games on the go. People now want instant access to all their business...

Read full article >

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 >

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