**Contents**show

## Can we swap 2 variables without a third one?

Using **arithmetic operators**

Swapping two variables without using a third variable. The arithmetic operators for addition and subtraction can be used to perform the swap without using a third variable. Similarly, multiplication and division can be used to perform the swap without using the third variable.

## How do you swap two variables in JavaScript?

**4 Ways to Swap Variables in JavaScript**

- Destructuring assignment. Destructuring assignment (a feature of ES2015) lets you extract items of an array into variables. …
- Temporary variable. Swapping variables using a temporary variable is classic. …
- Addition and difference. …
- Bitwise XOR operator. …
- Conclusion.

## How can we swap the value of two strings without using third variable?

**How do you swap two string variables without using third or temp variable in java?**

- public class SwapWithoutTemp {
- public static void main(String args[]) {
- String a = “Love”;
- String b = “You”;
- System.out.println(“Before swap: ” + a + ” ” + b);
- a = a + b;
- b = a.substring(0, a.length() – b.length());

## How do you swap elements in JavaScript?

For variable number of elements

You can swap any number of objects or literals, even of different types, using a simple identity function like this: **var swap = function** (x){return x}; b = swap(a, a=b); c = swap(a, a=b, b=c); For your problem: var swap = function (x){return x}; list[y] = swap(list[x], list[x]=list[y]);

## How can you swap two numbers without using a third variable using XOR?

**Method 1: Using Arithmetic operators + and –**

- #include<stdio.h>
- int main()
- {
- int a, b;
- printf(“Enter two numbers: “);
- scanf(“%d %d”, &a, &b); //consider two numbers as 4 and 5.
- a = a + b; //a = 4 + 5 = 9.
- b = a – b; //b = 9 – 5 = 4.

## How do you change values in two variables?

If the two variables are numbers, their values can be swapped using **arithmetic operators** such as addition and subtraction ( + , – ) or multiplication and division ( * , / ). This swapping method is based on calculating the sum of the two numbers and then swapping them using the sum and the difference from the sum.

## What is Destructuring in JavaScript?

Destructuring is a JavaScript expression that **allows us to extract data from arrays, objects, and maps and set them into new, distinct variables**. Destructuring allows us to extract multiple properties, or items, from an array at a time.

## How can I swap two strings without using third variable in C++?

**Algorithm**

- Define two strings that need to be swapped.
- Concatenate both the strings and store it in first string.
- Extract the string from indexes 0 to length (string1) – (string2) using substring function and store it in string 2.

## How do you swap two numbers?

**Let’s see another example to swap two numbers using * and /.**

- #include<stdio.h>
- #include<stdlib.h>
- int main()
- {
- int a=10, b=20;
- printf(“Before swap a=%d b=%d”,a,b);
- a=a*b;//a=200 (10*20)
- b=a/b;//b=10 (200/20)

## Why are strings immutable in Java?

String is Immutable in Java **because String objects are cached in String pool**. Since cached String literals are shared between multiple clients there is always a risk, where one client’s action would affect all another client. You are right. String in java uses concept of String Pool literal.

## How do you swap arrays?

A simple solution is to iterate over elements of both arrays and swap them one by one. A quick solution is to use **std::swap()**. It can directly swap arrays if they are of same size.

## How do you swap two numbers in an array?

**Write a c program for swapping of two arrays**

- #include<stdio.h>
- int main() {
- int a[10],b[10],c[10],i;
- printf(“Enter First array->”);
- for (i=0;i<10;i++)
- scanf(“%d”,&a[i]);
- printf(“nEnter Second array->”);
- for (i=0;i<10;i++)