Difference between revisions of "Pi"
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{{Pi}} | {{Pi}} | ||
| − | + | π (greek letter pi) is the ratio of the circumference of a circle to its diameter. | |
| − | + | π is about <code>3.14159265358979</code>. | |
| − | + | A full circle has <code>2*pi()</code> [[Radian|radians]]. | |
| − | + | In [[Pascal]], <code>system.pi</code> is a [[Function|function]] which returns the value of π. | |
| + | This gives you the chance to shadow (redefine) <code>pi()</code>. | ||
| + | |||
| + | <code>pi()/4</code> is the same as <code>arctan(1)</code>. | ||
== See also == | == See also == | ||
* [[doc:rtl/system/pi.html|Pi]] | * [[doc:rtl/system/pi.html|Pi]] | ||
| − | * [[doc:rtl/system/arctan.html|ArcTan]] | + | * [[doc:rtl/system/arctan.html|ArcTan]] calculate arc tangent. |
Revision as of 14:32, 24 January 2018
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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 Pascal, system.pi is a function which returns the value of π.
This gives you the chance to shadow (redefine) pi().
pi()/4 is the same as arctan(1).
