Integer to Hex?

fenonn has asked for the wisdom of the Perl Monks concerning the following question:

I know there is a function that converts a hex number into an integer, but for the life of me I can't find anything that does the reverse. All I have is a integer between 0 and 255 and want to print the equivalent hex value.

I read the perldoc, and searched here at perlmonks but I couldn't find what I needed. I really hope I didn't miss something obvious. Any help I can get would be great.

Fenonn

Comment on Integer to Hex?

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(bbfu) Re: Integer to Hex? by bbfu (Curate) on Jun 09, 2001 at 01:25 UTC
sprintf, specifically: `$hex = sprintf "%x", $integer`. bbfu Seasons don't fear The Reaper. Nor do the wind, the sun, and the rain. We can be like they are.	[reply] [d/l]
Re: Integer to Hex? by Big Willy (Scribe) on Jun 11, 2001 at 17:50 UTC
Assuming `$integer` stores your integer, this would probably produce a string scalar with the hex value in it: `$hex = unpack("H*", $integer);` [download] Of course you could omit the assignment to `$hex` and simply print the return of `unpack` too.	[reply] [d/l] [select]
Re: Integer to Hex? by Daddio (Chaplain) on Jun 09, 2001 at 01:35 UTC
Update: Oops, oops, oops...I guess I didn't read the question well enough. That's what I get for trying a reply after this kind of week. Reply withdrawn. D a d d i o	[reply]
Re: Integer to Hex? by Abigail (Deacon) on Jun 09, 2001 at 01:45 UTC
No, it doesn't. `hex` interprets its argument as being a hex number. But what was asked was to get a hex representation of a number. BTW, your `$dec_num` is misleading. `hex` just returns a number. It doesn't make much sense calling that a decimal number. "decimal" is relevant when we talk about representing numbers - for instance when reading in a number, or printing it. But all we do here is storing it. Most likely in a binary format - but which format it is, is irrelevant on the level of the language. -- Abigail	[reply]