Difference between revisions of "Greater than"
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− | The greater than symbol | + | |
+ | {{Greater than}} | ||
+ | |||
+ | <div style="float:right; margin: 0 20px 10px 0; padding:40px; font-size:500%; font-family: Georgia; background-color: #f9f9f9; border: 2px solid #777777;"><nowiki> > </nowiki> </div> | ||
+ | |||
+ | In [[ASCII]], the character code decimal <syntaxhighlight lang="pascal" inline>62</syntaxhighlight> (or [[Hexadecimal|hexadecimal]] <syntaxhighlight lang="pascal" inline>3E</syntaxhighlight>) is defined to be <syntaxhighlight lang="pascal" inline>></syntaxhighlight> (greater-than sign). | ||
+ | |||
+ | == comparison operator == | ||
+ | === true greater than === | ||
+ | The greater than symbol <syntaxhighlight lang="pascal" inline>></syntaxhighlight> is used to compare whether the value on the left side of the symbol, exceeds that of the value to the right side of the symbol. | ||
+ | The [[expression]] results in a [[Boolean|<syntaxhighlight lang="pascal" inline>boolean</syntaxhighlight> value]]. | ||
+ | |||
+ | <syntaxhighlight lang="pascal" line highlight="15,21,27,37"> | ||
+ | program comparisonDemo(input, output, stderr); | ||
+ | |||
+ | type | ||
+ | size = (tiny, small, medium, large, huge); | ||
+ | |||
+ | var | ||
+ | n, m: longint; | ||
+ | c, d: char; | ||
+ | |||
+ | begin | ||
+ | // of course, integers can be compared | ||
+ | n := 2; | ||
+ | m := -2; | ||
+ | |||
+ | if n > m then | ||
+ | begin | ||
+ | writeLn(n, ' > ', m); | ||
+ | end; | ||
+ | |||
+ | // also enumerative types can be ordered | ||
+ | if huge > medium then | ||
+ | begin | ||
+ | writeLn('huge is greater than medium'); | ||
+ | end; | ||
+ | |||
+ | // but the constants true and false are also comparable | ||
+ | if true > false then | ||
+ | begin | ||
+ | writeLn('true is greater than false'); | ||
+ | end; | ||
+ | |||
+ | // characters stay in a relation to each other, too | ||
+ | // (result depends on the used character set) | ||
+ | c := 'a'; | ||
+ | d := 'Z'; | ||
+ | |||
+ | if c > d then | ||
+ | begin | ||
+ | writeLn(c, ' > ', d); | ||
+ | end; | ||
+ | end. | ||
+ | </syntaxhighlight> | ||
+ | |||
+ | All ordinal types can be compared to values of the same type. | ||
+ | Integers can be compared to any integer. | ||
+ | |||
+ | <syntaxhighlight lang="pascal" line highlight="12,18"> | ||
+ | program comparisonSignedDemo(input, output, stderr); | ||
+ | |||
+ | var | ||
+ | n: int64; | ||
+ | m: qword; | ||
+ | |||
+ | begin | ||
+ | n := -1; // n stored as %111...111 | ||
+ | m := 2; // m stored as %000...010 | ||
+ | |||
+ | // signed comparison | ||
+ | if n > m then | ||
+ | begin | ||
+ | writeLn(n, ' > ', m); | ||
+ | end; | ||
+ | |||
+ | // "unsigned" comparison | ||
+ | if qword(n) > m then | ||
+ | begin | ||
+ | writeLn('qword(', n, ') > ', m); | ||
+ | end; | ||
+ | end. | ||
+ | </syntaxhighlight> | ||
+ | |||
+ | === greater than or equal to === | ||
+ | If the greater than symbol is followed by an [[Equal|equal sign]] <syntaxhighlight lang="pascal" inline>>=</syntaxhighlight>, the comparison also results in [[True|<syntaxhighlight lang="pascal" inline>true</syntaxhighlight>]] if both operands are equal to each other. | ||
+ | |||
+ | == bit shift operator == | ||
+ | Two consecutive greater-than signs <syntaxhighlight lang="pascal" inline>>></syntaxhighlight> act as the [[Shr|<syntaxhighlight lang="pascal" inline>shr</syntaxhighlight> operator]]. | ||
+ | |||
+ | == template list == | ||
+ | In [[Generics|generic type]] definitions the template list is delimited by a closing <syntaxhighlight lang="pascal" inline>></syntaxhighlight>. | ||
{{Symbols}} | {{Symbols}} |
Latest revision as of 17:22, 6 August 2022
│
English (en) │
suomi (fi) │
français (fr) │
русский (ru) │
In ASCII, the character code decimal 62
(or hexadecimal 3E
) is defined to be >
(greater-than sign).
comparison operator
true greater than
The greater than symbol >
is used to compare whether the value on the left side of the symbol, exceeds that of the value to the right side of the symbol.
The expression results in a boolean
value.
1program comparisonDemo(input, output, stderr);
2
3type
4 size = (tiny, small, medium, large, huge);
5
6var
7 n, m: longint;
8 c, d: char;
9
10begin
11 // of course, integers can be compared
12 n := 2;
13 m := -2;
14
15 if n > m then
16 begin
17 writeLn(n, ' > ', m);
18 end;
19
20 // also enumerative types can be ordered
21 if huge > medium then
22 begin
23 writeLn('huge is greater than medium');
24 end;
25
26 // but the constants true and false are also comparable
27 if true > false then
28 begin
29 writeLn('true is greater than false');
30 end;
31
32 // characters stay in a relation to each other, too
33 // (result depends on the used character set)
34 c := 'a';
35 d := 'Z';
36
37 if c > d then
38 begin
39 writeLn(c, ' > ', d);
40 end;
41end.
All ordinal types can be compared to values of the same type. Integers can be compared to any integer.
1program comparisonSignedDemo(input, output, stderr);
2
3var
4 n: int64;
5 m: qword;
6
7begin
8 n := -1; // n stored as %111...111
9 m := 2; // m stored as %000...010
10
11 // signed comparison
12 if n > m then
13 begin
14 writeLn(n, ' > ', m);
15 end;
16
17 // "unsigned" comparison
18 if qword(n) > m then
19 begin
20 writeLn('qword(', n, ') > ', m);
21 end;
22end.
greater than or equal to
If the greater than symbol is followed by an equal sign >=
, the comparison also results in true
if both operands are equal to each other.
bit shift operator
Two consecutive greater-than signs >>
act as the shr
operator.
template list
In generic type definitions the template list is delimited by a closing >
.
single characters |
|
character pairs |
|