Swap the two variable values without taking third variable?

int a=10,b=20; a=a*b; b=a/b; a=a/b;
I think
jignesh's first ans is best instead of using arithmatic operators.

hi,
you may use bitwise exclusive or operator to swap two number
example.
int x = 10;
int y = 12;
x ^= y;
y ^= x;
x ^= y;

you may also swap string without use third string

string a = "jignesh";
string b = "Trivedi";
a += b;
b = a.Substring(0, a.Length - b.Length);
a = a.Substring(b.Length);

hope this will help you.

int a=5,b=3;

  a=a+b;
  b=a-b; 
  a=a-b;


Now print the value of a and b....values have been swaped..


If it helps you then mark it as an accepted answer otherwise let me know..i will send you a small application implementing the same...