PreviousPrime (Float function): Difference between revisions

Revision as of 08:35, 23 February 2011

Find greatest prime smaller than this number (Float class)

The PreviousPrime intrinsic function returns the prime number that immediately precedes the method object value.

%number = float:PreviousPrime

%number	A numeric variable to receive the method result.
float	A `Float` value.

The method object value, float, is initially rounded to the nearest integer before the preceding prime is determined.
If float rounds to 2 or less or is greater than 2³¹-1, the request is cancelled.
PreviousPrime always returns a value lower than the current float value, even if float is currently prime.
PreviousPrime is available as of "Sirius Mods" Version 7.3.

The following statement returns 2.8:previousPrime = 2.
printText {~} = {2.8:previousPrime}

@@ Line 14: / Line 14: @@
 ==Usage notes==
-<ul><li>The method object value is initially rounded to the nearest integer before the preceding prime is determined.
+<ul><li>The method object value, <var class="term">float</var>, is initially rounded to the nearest integer before the preceding prime is determined.
 <li>If <var class="term">float</var> rounds to 2 or less or is greater than 2<sup>31</sup>-1, the request is cancelled.
-<li><var>PreviousPrime</var> always returns a value lower than the method object value, even if the method object value is prime.
+<li><var>PreviousPrime</var> always returns a value lower than the current <var class="term">float</var> value, even if <var class="term">float</var> is currently prime.
 <li><var>PreviousPrime</var> is available as of <var class="product">[[Sirius Mods|"Sirius Mods"]]</var> Version 7.3.</ul>

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