[DUPLICATE] Program to swap two numbers without using a third variable ....kindly help

Question

var

Answer 1

Please use the search bar , as the question you have may be already asked in the Q&A before
https://www.sololearn.com/discuss/772447/?ref=app

Answer 2

By this very simple algorithm:

a = a + b;
b = a - b;
a = a - b;

//Or

a = a ^ b;
b = a ^ b;
a = a ^ b;

Answer 3

or you could also use xor.
a = a^b;
b = a^b;
a = a^b;