Real constants and functions: Difference between revisions
→Pascal: standardize, →Delphi: shorten and make reference to →Pascal: , insert →Free Pascal: [reference to →Delphi: ]
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=={{header|Delphi}}==
Delphi supports all basic Standard Pascal (ISO 7185) functions shown in [[#Pascal|§ Pascal]].
Furthermore, the following is possible, too:
<lang Delphi>
LogN(BASE, x) // log of x for a specified base
Log2(x) // log of x for base 2
Log10(x) // log of x for base 10
Floor(x); // floor
Ceil(x); // ceiling
Power(x, y); // power</lang>
Note, <tt>Log</tt>, <tt>Floor</tt>, <tt>Ceil</tt> and <tt>Power</tt> are from the <tt>Math</tt> unit, which needs to be listed in the <tt>uses</tt>-clauses.
=={{header|DWScript}}==
▲See [[Real_constants_and_functions#Delphi|Delphi]].
=={{header|E}}==
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24.70529422006547
</pre>
=={{header|Free Pascal}}==
''See [[#Delphi|Delphi]]''
=={{header|Frink}}==
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=={{header|Pascal}}==
''See also [[#Delphi|Delphi]] and [[#Free Pascal|Free Pascal]]''<br/>
Following functions are defined by ISO standard 7185, Standard “Unextended” Pascal, and supported by any processor:
<lang pascal> { Euler’s constant }
exp(1)
{ principal square root of `x` }
sqrt(x)
{ natural logarithm }
ln(x)
{ exponential }
exp(x)
{ absolute value }
abs(x)</lang>
{{works with|Extended Pascal}}
Additionally, in Extended Pascal (ISO standard 10206) following operators and expressions can be used:
<lang pascal> { Pi }
2 * arg(cmplx(0.0, maxReal))
{ power, yields same data type as `base`, `exponent` has to be an `integer` }
base pow exponent
{ `real` power, `exponent` may be an `integer` or `real` value, yet `base` and }
{ `exponent` are automatically promoted to an approximate `real` value, result }
{ is `complex` if `base` is `complex`, otherwise a `real` value }
base ** exponent</lang>
<tt>Exp</tt>, <tt>sqrt</tt>, <tt>ln</tt>, and <tt>exp</tt> return <tt>real</tt> values, but a <tt>complex</tt> value if supplied with a <tt>complex</tt> value.
<tt>Abs</tt> always returns a value of the same data type as its argument.
=={{header|Perl}}==
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