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a^=b?

In a challenge question, two variables a and b were passed by reference and they were made to undergo this operation : a^=b; b^=a; a^=b; What does this do?

9/22/2017 2:36:37 PM

Siraz Naorem

15 Answers

New Answer

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ooh i puzzeled it with smthing else.. ^ is binary XOR OPERATOR a^b=40 it means 00101000 binary of 40 is 101000 It copies the bit if it is set inone operand but not both.

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a=2 (010); b=6 (110) //(binary) a^=b; //a=a^b -- 010 xor 110 = 100 a b^=a; //b=b^a -- 110 xor 100 = 010 b a^=b; //a=a^b -- 100 xor 010 = 110 a now: a=6 (110) and b=2 (010) interchanged values note: this could be a quiz on JavaScript, who votes up 👍

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It swops the values of a&b

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No it doesn't. I have seen the swapping code, it uses a third variable, else we add the numbers in beginning when swapping by two variables :/ I don't think that's the right answer.

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It does swop I checked

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You don't need a third variable you need manipulation

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@sayan bro, i know we can swap using only two variables. I added that in my response. Thanks though :) @Vengat, yea i guess it swaps. I tried it too. Is there a name for this operator? I'll just learn more about it online :)

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Ohhh... Well then I guess that much info should do. I'll search it up man. Thanks

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I mean, your code swops the variables

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I dunno, it is a bitwise operator all I care

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It's okay. *yawns* good night

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### BUT IT IS A SWAPPING METHOD### BINARY SWAPPING WITHOUT THIRD VARIABLE

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& | ^ << >> ~ 6 in total bitwise operator...

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u can swap without using a third variable brother... ## @ siraz

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a=5 b=6 a=a+b b=a-b a=a-b swapping