And/fi: what changed
Revision 4 to 5. Removed lines have a minus sign; added lines have a plus sign.
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| 1 | + | ```text | |
| 2 | 2 | category:Suomi | |
| 3 | 3 | ``` | |
| 4 | 4 | ||
| 5 | 5 | # And (ja) boolean lausekkeessa | |
| 6 | 6 | ||
| 7 | 7 | **And** eli **ja** -operaatio antaa [[True|true]] eli tosi arvon vain silloin kun molemmat operandit ovat tosia (true). Muissa tapauksissa tuloksena on epätosi eli [[False|false]]. | |
| 8 | 8 | ||
| 9 | 9 | ## And eli ja-operaation totuustaulukko | |
| 10 | 10 | ||
| 11 | 11 | | A | B | A and B (eli A ja B) | | |
| 12 | 12 | |:---------:|:---------:|--------------------------| | |
| 13 | 13 | | false | false | false | | |
| 14 | 14 | | false | true | false | | |
| 15 | 15 | | true | false | false | | |
| 16 | 16 | | true | true | true | | |
| 17 | 17 | ||
| 18 | 18 | # And eli ja bittikohtaisissa toiminnoissa | |
| 19 | 19 | ||
| 20 | 20 | Bitettäin tehtävä and (ja) asettaa kyseisen bitin ykköseksi (1) jos molemmat vastaavat bitit ovat ykkösiä (1). Muussa tapauksessa tulos on nolla (0). | |
| 21 | 21 | ||
| 22 | 22 | ## Onko kakkosen potenssi | |
| 23 | 23 | ||
| 24 | 24 | ``` pascal | |
| 25 | 25 | function IsPowerOfTwo( const aValue : longint ): boolean; | |
| 26 | 26 | var | |
| 27 | 27 | x : longint; | |
| 28 | 28 | b : boolean; | |
| 29 | 29 | begin | |
| 30 | 30 | b := false; | |
| 31 | 31 | if aValue <> 0 then | |
| 32 | 32 | begin | |
| 33 | 33 | x := aValue - 1; | |
| 34 | 34 | x := x and aValue; | |
| 35 | 35 | if x = 0 then b := true; | |
| 36 | 36 | end; | |
| 37 | 37 | result := b; | |
| 38 | 38 | end; | |
| 39 | 39 | ``` | |
| 40 | 40 | ||
| 41 | 41 | Jos kutsutaan IsPowerOfTwo(4) niin saadaan true. Jos kutsutaan IsPowerOfTwo(5) niin saadaan false . | |
| 42 | 42 | ||
| 43 | 43 | ### Lisätietoa | |
| 44 | 44 | ||
| 45 | 45 | - [[Not]] | |
| 46 | 46 | - [[Shl]] | |
| 47 | 47 | ||
| 48 | 48 | - [[Const/fi|Const]] | |
| 49 | 49 | - [[Function]] | |
| 50 | 50 | - [[Integer/fi|Integer]] | |
| 51 | 51 | ||
| 52 | 52 | - [[Shl|Clear a bit]] | |
| 53 | 53 | ||
| 54 | 54 | --- | |
| 55 | 55 | *From the Free Pascal wiki, page "And/fi", as it stood on 2020-01-26 after a change by Trev, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).* |