Difference between revisions of "period"
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== radix mark == | == radix mark == | ||
− | + | [[Pascal]] uses the <syntaxhighlight lang="pascal" inline>.</syntaxhighlight> (dot) to separate the integer and fractional part in literal decimal integers. | |
− | [[Pascal]] uses the <syntaxhighlight lang="pascal" | ||
<syntaxhighlight lang="pascal"> | <syntaxhighlight lang="pascal"> | ||
myReal := 6.28318 | myReal := 6.28318 | ||
</syntaxhighlight> | </syntaxhighlight> | ||
At least one digit in front of the period is mandatory. | At least one digit in front of the period is mandatory. | ||
− | A <syntaxhighlight lang="pascal" | + | A <syntaxhighlight lang="pascal" inline>0</syntaxhighlight> integer part must not be omitted. |
Numbers noted in a non-decimal base can not be noted in that way. | Numbers noted in a non-decimal base can not be noted in that way. | ||
− | E. | + | E. g. the numeric value “a half” can not be written as <syntaxhighlight lang="pascal" inline>%0.1</syntaxhighlight> ([[Percent sign|<syntaxhighlight lang="pascal" inline>%</syntaxhighlight>]] being the prefix marking [[Binary numeral system|binary numbers]]). |
== identifier scope selector == | == identifier scope selector == | ||
− | + | For structured data types the dot separates the data structure identifier from its individual components, i. e. methods or data fields. | |
− | For structured data types the dot separates the data structure identifier from its individual components, i. | ||
<syntaxhighlight lang="pascal" line highlight="14,16-19"> | <syntaxhighlight lang="pascal" line highlight="14,16-19"> | ||
program recordDemo(input, output, stderr); | program recordDemo(input, output, stderr); | ||
Line 40: | Line 38: | ||
== range == | == range == | ||
− | + | Two consecutive dots <syntaxhighlight lang="pascal" inline>..</syntaxhighlight> let you specify an ordinal [[subrange types|type sub-range]]. | |
− | Two consecutive dots <syntaxhighlight lang="pascal" | ||
<syntaxhighlight lang="pascal"> | <syntaxhighlight lang="pascal"> | ||
type | type | ||
signumCodomain = -1..1; | signumCodomain = -1..1; | ||
</syntaxhighlight> | </syntaxhighlight> | ||
− | <small>This is the same as {{Doc|package=RTL|unit=math|identifier=tvaluesign|text=<syntaxhighlight lang="pascal" | + | <small>This is the same as {{Doc|package=RTL|unit=math|identifier=tvaluesign|text=<syntaxhighlight lang="pascal" inline>math.TValueSign</syntaxhighlight>}}.</small> |
== module end == | == module end == | ||
− | The main block of any module, i. | + | The main block of any module, i. e. [[Program|<syntaxhighlight lang="pascal" inline>program</syntaxhighlight>]], [[Unit|<syntaxhighlight lang="pascal" inline>unit</syntaxhighlight>]] or [[Library|<syntaxhighlight lang="pascal" inline>library</syntaxhighlight>]], has to be closed with an [[End|<syntaxhighlight lang="pascal" inline>end</syntaxhighlight>]] “dot”: |
<syntaxhighlight lang="pascal" highlight="5"> | <syntaxhighlight lang="pascal" highlight="5"> | ||
Line 61: | Line 58: | ||
It can be seen as an adoption of natural (written) languages, where a full stop marks an end of a sentence. | It can be seen as an adoption of natural (written) languages, where a full stop marks an end of a sentence. | ||
− | Anything else after the final <syntaxhighlight lang="pascal" | + | Anything else after the final <syntaxhighlight lang="pascal" inline>end.</syntaxhighlight>, assuming syntactical correctness, will be ignored by the [[Compiler|compiler]]. |
− | |||
== namespaces == | == namespaces == | ||
− | + | [[Unit]] names containing dots create [[Namespaces|namespaces]]. | |
− | Unit names containing dots create namespaces. | ||
== ASCII value == | == ASCII value == | ||
− | + | In [[ASCII]], the character code decimal <syntaxhighlight lang="pascal" inline>46</syntaxhighlight> | |
− | In [[ASCII]], the character code decimal <syntaxhighlight lang="pascal" | + | (or [[Hexadecimal|hexadecimal]] <syntaxhighlight lang="pascal" inline>2E</syntaxhighlight>) is defined to be |
− | (or [[Hexadecimal|hexadecimal]] <syntaxhighlight lang="pascal" | + | <syntaxhighlight lang="pascal" inline>.</syntaxhighlight> (full stop). |
− | <syntaxhighlight lang="pascal" | ||
{{Symbols}} | {{Symbols}} | ||
[[Category:Code]] | [[Category:Code]] |
Latest revision as of 17:48, 9 July 2020
│
English (en) │
suomi (fi) │
français (fr) │
radix mark
Pascal uses the .
(dot) to separate the integer and fractional part in literal decimal integers.
myReal := 6.28318
At least one digit in front of the period is mandatory.
A 0
integer part must not be omitted.
Numbers noted in a non-decimal base can not be noted in that way.
E. g. the numeric value “a half” can not be written as %0.1
(%
being the prefix marking binary numbers).
identifier scope selector
For structured data types the dot separates the data structure identifier from its individual components, i. e. methods or data fields.
1program recordDemo(input, output, stderr);
2
3uses
4 Linux;
5
6var
7 info: TSysInfo;
8begin
9 if sysInfo(@info) <> 0 then
10 begin
11 halt(1);
12 end;
13
14 writeLn('uptime: ', info.uptime, ' seconds');
15
16 with info do
17 begin
18 writeLn('total free: ', freeram, ' bytes');
19 end;
20end.
range
Two consecutive dots ..
let you specify an ordinal type sub-range.
type
signumCodomain = -1..1;
This is the same as math.TValueSign
.
module end
The main block of any module, i. e. program
, unit
or library
, has to be closed with an end
“dot”:
program hiWorld(input, output, stderr);
begin
writeLn('Hi world!');
end.
It can be seen as an adoption of natural (written) languages, where a full stop marks an end of a sentence.
Anything else after the final end.
, assuming syntactical correctness, will be ignored by the compiler.
namespaces
Unit names containing dots create namespaces.
ASCII value
In ASCII, the character code decimal 46
(or hexadecimal 2E
) is defined to be
.
(full stop).
single characters |
|
character pairs |
|