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)
.