UrbanPro

Learn C Language from the Best Tutors

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

Search in

How do I swap two variables in one line in C/C++, Python and Java?

Asked by Last Modified  

Follow 4
Answer

Please enter your answer

Web Developer

you can use this following example : int main() { int x = 5, y = 10; (x ^= y), (y ^= x), (x ^= y); printf("After Swapping values of x and y are %d %d", x, y); return 0; }
Comments

Advance Excel And VBA Training

How to swap in a single line without using library function? Python: In Python, there is a simple and syntactically neat construct to swap variables, we just need to write “x, y = y, x”. C/C++: Below is one generally provided classical solution // Swap using bitwise XOR (Wrong Solution in C/C++) x...
read more
How to swap in a single line without using library function? Python: In Python, there is a simple and syntactically neat construct to swap variables, we just need to write “x, y = y, x”. C/C++: Below is one generally provided classical solution // Swap using bitwise XOR (Wrong Solution in C/C++) x ^= y ^= x ^= y; The above solution is wrong in C/C++ as it causes undefined behaviour (compiler is free to behave in any way). The reason is, modifying a variable more than once in an expression causes undefined behaviour if there is no sequence point between the modifications. However, we can use comma to introduce sequence points. So the modified solution is // Swap using bitwise XOR (Correct Solution in C/C++) // sequence point introduced using comma. (x ^= y), (y ^= x), (x ^= y); Java: In Java, rules for subexpression evaluations are clearly defined. The left hand operand is always evaluated before right hand operand. In Java, the expression “x ^= y ^= x ^= y;” doesn’t produce the correct result according to Java rules. It makes x = 0. However, we can use “x = x ^ y ^ (y = x);” Note the expressions are evaluated from left to right. If x = 5 and y = 10 initially, the expression is equivalent to “x = 5 ^ 10 ^ (y = 5);”. Note that we can’t use this in C/C++ as in C/C++, it is not defined whether left operand or right operand is executed for any operator. Output: After Swapping values of x and y are 10 5 read less
Comments

Advance Excel And VBA Training

(x ^= y), (y ^= x), (x ^= y);
Comments

View 1 more Answers

Related Questions

Why are there so many programming languages if most programmers use C, C++, Java, and PHP?
This question has the same answer as the question"Why there are so many languages?" has... As they were ask meant for different purpose to serve for different platforms... For short: Link it to the languages used
Veerendra
0 0
7
How can I improve my C language skills so that if anyone asks me any questions about C, I can have the answer to those particular questions?
There are types of questions asked in this sector. 1.Related to Syntax and theoretical. For this you have to have a sound knowledge of the language. 2.Related to programming and output's. For this...
Furqankhan
0 0
5
Can include files be nested?
Yes. Include files can be nested any number of times. As long as you use precautionary measures, you can avoid including the same file twice. In the past, nesting header files was seen as bad programming...
Himangi
0 0
7
When is a "switch" statement better than multiple "if" statements?
switch statement is generally best to use when you have more than two conditional expressions based on a single variable of numeric type. For instance, rather than the code if (x == 1) printf(“x...
Shalu
Why is the C language important?
C language is a high-level, general-purpose programming language. It provides a straightforward, consistent, powerful interface for programming systems. That's why the C language is widely used for developing...
Ganesh
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

Some interview questions for freshers on C language
Q1. What are the two forms of #include? There are two variants of #include. The one is #include and the other one is #include”file”. In general the first form that is #include is used to...

C, Cpp, Java, Python, Javascript Programming Languages
Learning C is as good as Learning a Natural Language(such as English, Hindi, Telugu, Tamil etc) We use Natural Languages to communicate with humans whereas we use Programming Languages such as C, Cpp,...
V

Vamshi

0 0
0

C++ Program-Working with constant using #define preprocessor
//Header Files #include#include // using #define preprocessor for defining a constant#define len 10#define br 5#define rad 3#define NEWLINE '\n' //Main function void main(){ int area_r; float area_c; //Function...
S

Creating First Program Using C Language
Step 1: Install and setup Turbo C compiler on your computer. Step 2: Open Turbo C from your Desktop or Programs menu. Select “File” from menu bar and select option “New”. Step...

Static and dynamic libraries
A library is a package of code that is meant to be reused by many programs. A static library (also known as an archive) consists of routines that are compiled and linked directly into your program. When...

Recommended Articles

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 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 >

Applications engineering is a hot trend in the current IT market.  An applications engineer is responsible for designing and application of technology products relating to various aspects of computing. To accomplish this, he/she has to work collaboratively with the company’s manufacturing, marketing, sales, and customer...

Read full article >

Whether it was the Internet Era of 90s or the Big Data Era of today, Information Technology (IT) has given birth to several lucrative career options for many. Though there will not be a “significant" increase in demand for IT professionals in 2014 as compared to 2013, a “steady” demand for IT professionals is rest assured...

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