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Friday, December 9, 2011

Swap two numeric variables

A simple tips to swap two numeric variables!

Imagine that you have two numeric variables. a and b

int a = 5;
int b = 8;

// Swap numbers
a = a ^ b;
b = b ^ a;
a = a ^ b;

Now the numbers is swapped.

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2 comments:

  1. Yosua JbFebruary 7, 2012 at 8:08 PM

    Cool tip, but it's slow. Slower than conventional use of temporary variable. One may think of it in assembly code terms. Also, that method requires the input at a step depending on the result of the previous step; strictly sequential.

    ReplyDelete
  2. Ali Irawan (Wen)February 9, 2012 at 12:30 PM

    Yes. Mostly temporary variable used most in pratical. :)

    ReplyDelete