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Well, for any kind of address, x is used to represent it. What does x actually signify?

Srujan Barai
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  • The origin is probably simply that 'X' rhymes with hex. – Nikolai Ruhe Feb 27 '14 at 08:08
  • After reading the answers, I could make out, `x` represents that the number is in hexadecimal. Well, what to use to show if a number in in any other format(for instance say decimal). – Srujan Barai Feb 27 '14 at 08:19
  • @Raedwald. This asks for answer, that for reason. Had it been shown in search results, i would not ask this question. thnx pal. – Srujan Barai Feb 27 '14 at 08:25

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It's not just for addresses. The 0x prefix is used for hexadecimal literals in, as far as I know, all C-style languages (C, Java, C++, Objective-C, C#...) and probably others as well.

0x10 is, for instance, 10 hexadecimal, or 16 decimal.

More information is available in the answers to this question.

Community
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dandan78
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It means it is in hexadecimal format, i.e a number with a base of 16, instead of 10, as are usual.

Kaerber
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0x is te prefix used to represent numbers in hexadecimal notation.

In this case, 0x00000000 is the value used to represent null memory adresses (equivalent to the keyword null for high level languages like Java, C# and many others).

S1cK94
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