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

Asked by Last Modified  

3 Answers

Learn C Language

Follow 4
Answer

Please enter your answer

Ashish Soni

AI Engineer | Full Stack 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
Dislike Bookmark

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
Dislike Bookmark

Advance Excel And VBA Training

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

View 1 more Answers

Related Questions

What are the control statements in C language?
Control statements in C are constructs that allow the program to make decisions and control the flow of execution based on certain conditions. The primary control statements in C include if-else statements,...
Jitender
0 0
6
Which book is best for learning C programming by a beginner?
One of the most highly recommended books for beginners learning C programming is "The C Programming Language" by Brian Kernighan and Dennis Ritchie. It's often referred to as the "K&R C" book and is praised...
Anil
0 0
8
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
Is it necessary to learn the C language and also C++ before joining an engineering college?
it is not necessary to learn C and C++, but if you want to make your are career in computer then learn C & C++ because these are basic computer language.
J.k.kavyadharshini
What are the flaws of the C programming language?
The C programming language, while powerful and widely used, has some inherent flaws. One notable limitation is its lack of built-in support for dynamic memory management and bounds checking. This can lead...
Sounak
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

Compiler vs Interpreter
Compiler Interpreter Convert all the code into binary format and execute. Convert one statement at a time and execute, then Convert next statement and execute. After conversion, source...

Umasankar Natarajan

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...

Salim Ahmed Ansari

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
What Would Be Life Cycle Of A Fresher After Campus In An IT Company?
1. Basic Technical Training: Since freshers are not subject matter experts so gone through 3 - 6 months basic technical training within Organization. 2. Technical Assessment: HR sends freshers to various...

Amit K.

0 0
0
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

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 >

What is Applications Engineering all about?

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 >

8 Hottest IT Careers of 2014!

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 >

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 Gurgaon
C Language Classes in Ghaziabad

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