Binary-coded decimal - Revision history

Jsummers: Category:Number formats

2017-09-16T15:35:09Z

Category:Number formats

Jsummers at 19:26, 23 August 2017

2017-08-23T19:26:13Z

Jsummers: Changed primary category

2015-12-04T18:58:53Z

Changed primary category

Dan Tobias at 17:23, 15 February 2014

2014-02-15T17:23:36Z

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Binary Data }} Binary-coded decimal ('''BCD''') is a family of methods to encode decimal numbers in binary data formats. It is ..."

2014-02-15T16:55:04Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Binary Data }} Binary-coded decimal ('''BCD''') is a family of methods to encode decimal numbers in binary data formats. It is ..."

New page

{{FormatInfo
|formattype=electronic
|subcat=Binary Data
}}
[[Binary-coded decimal]] ('''BCD''') is a family of methods to encode decimal numbers in binary data formats. It is not particularly common, though it used to be more common than it is now.

It is inefficient compared to purely base-2 number formats, but it can be useful when accurate decimal calculations are needed.

== Format ==
Each decimal digit is encoded in four bits:

{| class="wikitable"
! Digit
! BCD encoding
|-
|0 || 0000
|-
|1 || 0001
|-
|2 || 0010
|-
|3 || 0011
|-
|4 || 0100
|-
|5 || 0101
|-
|6 || 0110
|-
|7 || 0111
|-
|8 || 1000
|-
|9 || 1001
|}

Two digits are usually packed into a single byte, though there can be just be one digit per byte, among other possible encodings.

== Links ==
* [[Wikipedia:Binary-coded decimal|Wikipedia article]]

← Older revision		Revision as of 15:35, 16 September 2017
Line 44:		Line 44:
	* [[Wikipedia:Binary-coded decimal\|Wikipedia article]]		* [[Wikipedia:Binary-coded decimal\|Wikipedia article]]

−	[[Category:~~Integer~~ formats]]	+	[[Category:Number formats]]

@@ Line 5: / Line 5: @@
 [[Binary-coded decimal]] ('''BCD''') is a family of methods to encode decimal numbers in binary data formats. It is not particularly common, though it used to be more common than it is now.
-It is inefficient compared to purely base-2 number formats, but it can be useful when accurate decimal calculations are needed.
+It is inefficient compared to purely [[Base2|base-2]] number formats, but it can be useful when accurate decimal calculations are needed.
 [[EBCDIC]] was derived from IBM's forms of BCD, expanded to encompass non-numeric characters.
@@ Line 36: / Line 36: @@
 |9 || 1001
 |}
 Two digits are usually packed into a single byte, though there can be just be one digit per byte, among other possible encodings.
@@ Line 42: / Line 44: @@
 * [[Wikipedia:Binary-coded decimal|Wikipedia article]]
-[[Category:Binary Data]]
+[[Category:Integer formats]]

← Older revision		Revision as of 17:23, 15 February 2014
Line 6:		Line 6:

	It is inefficient compared to purely base-2 number formats, but it can be useful when accurate decimal calculations are needed.		It is inefficient compared to purely base-2 number formats, but it can be useful when accurate decimal calculations are needed.
		+
		+	[[EBCDIC]] was derived from IBM's forms of BCD, expanded to encompass non-numeric characters.

	== Format ==		== Format ==

@@ Line 1: / Line 1: @@
 {{FormatInfo
 |formattype=electronic
-|subcat=Binary Data
+|subcat=Elements of File Formats
 }}
 [[Binary-coded decimal]] ('''BCD''') is a family of methods to encode decimal numbers in binary data formats. It is not particularly common, though it used to be more common than it is now.
@@ Line 41: / Line 41: @@
 == Links ==
 * [[Wikipedia:Binary-coded decimal|Wikipedia article]]