Difference between revisions of "Pi"

Latest revision as of 17:14, 6 August 2022

π (greek letter pi) is the ratio of the circumference of a circle to its diameter. π is about 3.14159265358979. A full circle has 2*pi() radians.

In Free Pascal's RTL, system.pi is a function which returns the value of π. This allows you to assign addr(system.pi) to a procedural variable.

pi()/4 is the same as arctan(1).

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 {{Pi}}
-Pi is the ratio of the circumference of a circle to its diameter.
+π (greek letter pi) is the ratio of the circumference of a circle to its diameter.
-Pi is about 3.14159265358979. A full circle has 2*Pi [[Radian|radians]].
+π is about <syntaxhighlight lang="pascal" inline>3.14159265358979</syntaxhighlight>.
-In [[Pascal]], Pi is a [[Function|function]] which returns the value of pi.
+A full circle has <syntaxhighlight lang="pascal" inline>2*pi()</syntaxhighlight> [[Radian|radians]].
-Pi/4 is the same as arctan(1).
+In [[Free Pascal|Free Pascal's]] [[RTL]], <syntaxhighlight lang="pascal" inline>system.pi</syntaxhighlight> is a [[Function|<syntaxhighlight lang="pascal" inline>function</syntaxhighlight>]] which returns the value of π.
+This allows you to assign <syntaxhighlight lang="pascal" inline>addr(system.pi)</syntaxhighlight> to a procedural variable.
+<syntaxhighlight lang="pascal" inline>pi()/4</syntaxhighlight> is the same as <syntaxhighlight lang="pascal" inline>arctan(1)</syntaxhighlight>.
 == See also ==
-* [[doc:rtl/system/pi.html|Pi]]
+* {{Doc|package=RTL|unit=system|identifier=pi|text=<syntaxhighlight lang="pascal" inline>system.pi</syntaxhighlight>}}
-* [[doc:rtl/system/arctan.html|ArcTan]] Calculate arctangent.
+* {{Doc|package=RTL|unit=system|identifier=arctan|text=<syntaxhighlight lang="pascal" inline>system.arctan</syntaxhighlight>}} calculates arc tangent.
-[[Category:Constants]]