# Program of Swapping two numbers in C Language

Trading of two numbers in C Language is the interaction where the worth of two factors is traded utilizing some code. For instance,

We can trade two numbers in different ways as follows:

1. Swapping two variable values using a Temporary Variable
2. Swapping two variable values using Addition and Subtraction
3. Swapping two variable values using Bitwise Operator
4. Swapping two variable values using Multiplication and Division

## 1. Swapping two numbers in C using a temporary Variable

We should begin with the calculation steps first,

### Algorithm:

1. declare three variables x, y and temp
2. take input in x and y, say x = 5 and y = 7
3. assign the value of x to temp, say 5
4. now temp = 5 and x = 5
5. put the value of y in x, so y = 7 and x = 7
6. then, put the value of temp in y, so temp = 5 and y = 5

The following is a program to trade two numbers utilizing brief variable.

#include<stdio.h>

#include<conio.h>

void main()

{

int x = 10, y = 15, temp;

temp = x;

x = y;

y = temp;

printf(“x = %d and y = %d”, x, y);

getch();

}

## 2. Swapping two numbers using Addition and Subtraction

We should begin with the calculation steps first,

### Algorithm:

1. Take input of the two numbers, say x = 5 and y = 7
2. Store the sum of both the numbers in the first number(x = 5 + 7 so x = 12) and store the difference of both the numbers in the second number(y = 12 – 7, so y = 5).
3. Then store their difference in the first number(x = 12 – 5 so x = 7) and print.

The following is a program to trade two numbers without utilizing any transitory variable, and use expansion and deduction administrator for making it happen.

#include<stdio.h>

#include<conio.h>

void main()

{

int x = 10, y = 15;

x = x + y – (y = x);

printf(“x = %d and y = %d”,x,y);

getch();

}

## 3. Swapping two numbers using Bitwise Operator

XOR gives yield as 1 when two unique pieces are XORed and give 0 when two same pieces are XORed. The XOR of two numbers x and y returns a number that has every one of the pieces as 1 any place pieces of x and y vary. For instance, XOR of 7 (0111) and 5 (0101) is (0010).

### Algorithm:

1. Input two numbers, say x = 5 and y = 7
2. XOR the two numbers and store the result in the first number(x = 5 ^ 7 so x = 2)
3. XOR the two numbers again and store the result in the second number (y = 2 ^ 7 so y = 5)
4. XOR the two numbers again and store the result in the first number (x = 2 ^ 5 so x = 7)

The following is the program to trade two numbers utilizing bitwise administrator.

#include<stdio.h>

#include<conio.h>

void main()

{

int x = 6, y = 4;

x = x^y;

y = x^y;

x = x^y;

printf(“x = %d and y = %d”, x, y);

getch();

}

## 4. Swapping two numbers using Multiplication and Division

### Algorithm:

1. Take input of the two numbers, say x = 5 and y = 7
2. Store the product of both the numbers in the first number(x = 5 * 7 so x = 35) and store the quotient of both the numbers in the second number(y = 35 / 7, so y = 5).
3. Then store their difference in the first number(x = 35 / 5 so x = 7) and print.

The following is the program to trade two numbers utilizing duplication and division.

#include<stdio.h>

#include<conio.h>

void main()

{

int x = 6, y = 4;

x = x*y;

y = x/y;

x = x/y;

printf(“x = %d and y = %d”, x, y);

getch();

}

### Points to Remember

1. In the algorithm using addition and division and XOR, if the values are very big, it can result in integer overflow.
2. In the algorithm using division and multiplication, if one of the values is zero, the product will become zero and the algorithm will fail.
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