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Swapping of Two Numbers in C

In this program, You will learn C Program to Swap two numbers using temporary variables or without temporary variables.

Swapping of two numbers means exchanging values of two variables with each.
For example:
before swapping a=10, b=5
after swapping a=5 and b=10

Swapping of Two Numbers using temporary variables

#include<stdio.h>
int main()
{       
  int a=10,b=5,temp;
  printf("before swapping \n a=%d and b=%d",a,b);
  temp=a;
  a=b;
  b=temp;
  printf("\nafter swapping two number\n a=%d and b=%d",a,b);
  return 0;
}

output

before swapping
 a=10 and b=5
 after swapping two number
 a=5 and b=10

Logic to Find swapping of two numbers by using a temporary variable

In this program, you will swap two numbers with the help of a temporary variable.
copy the value of the first number i.e a in a temporary variable say temp. temp=a
copy the value of the second number i.e b into the first number i.e a. a=b
copy the value of temp into the second number. b=temp

Swapping of Two Numbers without temporary variables

#include<stdio.h>
int main()
{           
  int a=10,b=5;
  printf("before swapping \n a=%d and b=%d",a,b);
  a=a+b;
  b=a-b;
  a=a-b;
  printf("\nafter swapping two number\n a=%d and b=%d",a,b);
  return 0;
}

output

before swapping
 a=10 and b=5
 after swapping two number
 a=5 and b=10

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