C program example for swapping 2 numbers:

What is swapping?

Swaping is nothing but interchanging. It may be the value of 2 numbers or something to exchange between them. For example, consider below example.

Before swapping, the values of A and B are as below.
A = 10
B = 20
After swapping, the values of A and B will be as below.
A = 20
B = 10

Example C program for swapping 2 numbers with temp variable:

#include <stdio.h>
int main()
{
   int A, B, temp;

   printf("Please enter the 1st number : ");
   scanf("%d",&A);
   printf("\nPlease enter the 2nd number : ");
   scanf("%d",&B);

   printf("\nBefore swapping:\n");
   printf("A - %d \nB - %d", A, B);
 
   temp = A;
   A = B;
   B = temp;

   printf("\nAfter swapping:\n");
   printf("A - %d \nB - %d", A, B);

   return 0;
}

#include <stdio.h>

int main()

{

int A, B, temp;

printf("Please enter the 1st number : ");

scanf("%d",&A);

printf("\nPlease enter the 2nd number : ");

scanf("%d",&B);

printf("\nBefore swapping:\n");

printf("A - %d \nB - %d", A, B);

temp = A;

A = B;

B = temp;

printf("\nAfter swapping:\n");

printf("A - %d \nB - %d", A, B);

return 0;

}

Output of C program for swapping 2 numbers with temp variable:

Please enter the 1st number : 20
Please enter the 2nd number : 30
Before swapping:
A – 20
B – 30
After swapping:
A – 30
B – 20

Example C program for swapping 2 numbers without temp variable:

#include <stdio.h>
int main()
{
   int A, B;

   printf("Please enter the 1st number : ");
   scanf("%d",&A);
   printf("\nPlease enter the 2nd number : ");
   scanf("%d",&B);

   printf("\nBefore swapping:\n");
   printf("A - %d \nB - %d", A, B);
 
   A = A - B;
   B = A + B;
   A = B - A;

   printf("\nAfter swapping:\n");
   printf("A - %d \nB - %d", A, B);

   return 0;
}

#include <stdio.h>

int main()

{

int A, B;

printf("Please enter the 1st number : ");

scanf("%d",&A);

printf("\nPlease enter the 2nd number : ");

scanf("%d",&B);

printf("\nBefore swapping:\n");

printf("A - %d \nB - %d", A, B);

A = A - B;

B = A + B;

A = B - A;

printf("\nAfter swapping:\n");

printf("A - %d \nB - %d", A, B);

return 0;

}

Output of C program for swapping 2 numbers without temp variable:

Please enter the 1st number : 45
Please enter the 2nd number : 67
Before swapping:
A – 45
B – 67
After swapping:
A – 67
B – 45

OTHER C PROGRAMS:

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