statement: what changed
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Title: statement
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| 1 | + | Statements are parts of a [[Executable program|program]] that alter its state, e. g. by changing a [[Variable|variable’s]] value. | |
| 2 | + | ||
| 3 | + | ## classification | |
| 4 | + | ||
| 5 | + | One may distinguish between simple and structured statements. | |
| 6 | + | ||
| 7 | + | Elementary statements are those, which can not be broken down into smaller pieces – “sub-statements”. These are | |
| 8 | + | ||
| 9 | + | - [[Becomes|assignments]], | |
| 10 | + | - [[Routine|procedure calls]], | |
| 11 | + | - [[Raise|raise]] control transfer, and | |
| 12 | + | - [[Goto|goto jumps]]. | |
| 13 | + | ||
| 14 | + | Complex statements are | |
| 15 | + | ||
| 16 | + | - compound statements (also called *sequence*) delimited by [[Begin|begin]] and [[End|end]], | |
| 17 | + | - inline assembler blocks delimited by [[Asm|asm]] and `end`, | |
| 18 | + | - [[Branch|branches]], and | |
| 19 | + | - [[Loops|loops]]. | |
| 20 | + | ||
| 21 | + | ## remarks | |
| 22 | + | ||
| 23 | + | In contrast to statements, instructions are the building blocks in low-level [[Assembly language|assembly language]]. | |
| 24 | + | ||
| 25 | + | [[;|Empty statements]] are not statements in a formal sense, since they merely exist to satisfy syntax requirements in a non-superfluous manner. | |
| 26 | + | ||
| 27 | + | ## see also | |
| 28 | + | ||
| 29 | + | - [[Block|block]] | |
| 30 | + | - [[expression]] | |
| 31 | + | - [Chapter “Statements” in the *Free Pascal reference guide*](https://www.freepascal.org/docs-html/ref/refch13.html) | |
| 32 | + | ||
| 33 | + | --- | |
| 34 | + | *From the Free Pascal wiki, page "statement", as it stood on 2020-06-22 after a change by Kai Burghardt, 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).* |