System Variable IC - Revision history

Paul Robinson: t/c

2019-10-13T20:03:00Z

t/c

← Older revision		Revision as of 16:03, 13 October 2019
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	{{System Variables}}		{{System Variables}}
	{{Article footer\|0\|NO}}		{{Article footer\|0\|NO}}
	[[Category:System variables]]		[[Category:System variables\|IC]]

2019-10-13T20:01:42Z

2019-10-13T19:55:49Z

t/c

2019-10-13T19:54:44Z

2019-10-13T19:51:25Z

2018-04-16T20:36:04Z

← Older revision		Revision as of 16:36, 16 April 2018
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	<h1><aplxx>⎕IC</aplxx> - Indeterminate Control</h1>		<h1><aplxx>⎕IC</aplxx> - Indeterminate Control</h1>
	{{BoxStart\|<apll>Z←⎕IC</apll>		{{BoxStart\|<apll>Z←⎕IC</apll>
	\| returns the current value of the Indeterminate Control ~~Vector~~.}}		\| returns the current value of the Indeterminate Control vector.}}
	{{BoxEnd\|<apll>Z</apll> is an integer vector whose elements each control a separate aspect of how indeterminates are handled by the system.}}		{{BoxEnd\|<apll>Z</apll> is an integer vector whose elements each control a separate aspect of how indeterminates are handled by the system.}}
	<br />		<br />
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	\|\| <apll>⎕IC←R</apll> \|\| sets all of the values of the Indeterminate Control Vector to <apll>R</apll>.		\|\| <apll>⎕IC←R</apll> \|\| sets all of the values of the Indeterminate Control Vector to <apll>R</apll>.
	\|-		\|-
	\| valign="top" \|<apll>⎕IC←⍬</apll> \|\| sets all of the values of the Indeterminate Control ~~Vector~~ to their system default state.		\| valign="top" \|<apll>⎕IC←⍬</apll> \|\| sets all of the values of the Indeterminate Control vector to their system default state.
	\|-		\|-
	\|\| <apll>⎕IC[L]←R</apll> \|\| sets the value(s) of the Indeterminate Control ~~Vector~~ indexed by <apll>L</apll> to <apll>R</apll>.		\|\| <apll>⎕IC[L]←R</apll> \|\| sets the value(s) of the Indeterminate Control vector indexed by <apll>L</apll> to <apll>R</apll>.
	\|-		\|-
	\|}		\|}

2018-04-16T17:05:35Z

← Older revision		Revision as of 13:05, 16 April 2018
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	<h1><~~apl~~>~~{quad}IC~~</~~apl~~> - Indeterminate Control</h1>		<h1><aplxx>⎕IC</aplxx> - Indeterminate Control</h1>
	{{BoxStart\|<apll>Z←⎕IC</apll>		{{BoxStart\|<apll>Z←⎕IC</apll>
	\| returns the current value of the Indeterminate Control Vector.}}		\| returns the current value of the Indeterminate Control Vector.}}
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	<p>For example,</p>		<p>For example,</p>

	<apll>		<apll><pre>
	~~      ~~⎕IO←0~~<br />~~		⎕IO←0
	~~      ~~⎕IC~~<br />~~		⎕IC
	3 4 3 2 2 1 2 2 2 2 2 2 2 4 3 1 2 0 3 2 2 1 2 2 1 5 2 2 2~~<br />~~		3 4 3 2 2 1 2 2 2 2 2 2 2 4 3 1 2 0 3 2 2 1 2 2 1 5 2 2 2
	~~      ~~0÷0~~<br />~~		0÷0
	1~~<br />~~		1
	~~      ~~⎕IC[5]←2~~<br />~~		⎕IC[5]←2
	~~      ~~⎕IC~~<br />~~		⎕IC
	3 4 3 2 2 2 2 2 2 2 2 2 2 4 3 1 2 0 3 2 2 1 2 2 1 5 2 2 2~~<br />~~		3 4 3 2 2 2 2 2 2 2 2 2 2 4 3 1 2 0 3 2 2 1 2 2 1 5 2 2 2
	~~      ~~0÷0~~<br />~~		0÷0
	DOMAIN ERROR~~<br />~~		DOMAIN ERROR
	~~      ~~0÷0~~<br />~~		0÷0
	~~       ~~∧~~<br />~~		∧
	~~      ~~⎕IC←⍬~~<br />~~		⎕IC←⍬
	~~      ~~⎕IC~~<br />~~		⎕IC
	3 4 3 2 2 1 2 2 2 2 2 2 2 4 3 1 2 0 3 2 2 1 2 2 1 5 2 2 2<br />		3 4 3 2 2 1 2 2 2 2 2 2 2 4 3 1 2 0 3 2 2 1 2 2 1 5 2 2 2
	</apll>		</pre></apll>

	To set all indeterminate results to <apll>DOMAIN ERROR</apll>, use <apll>⎕IC[]←2</apll>.		To set all indeterminate results to <apll>DOMAIN ERROR</apll>, use <apll>⎕IC[]←2</apll>.

2017-03-11T22:38:09Z

← Older revision		Revision as of 18:38, 11 March 2017
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	<tr>		<tr>
	<td align="center">5</td>		<td align="center">5</td>
			<td align="center"><apll>NaN (∅)</apll></td>
			</tr>

			<tr>
			<td align="center">6</td>
	<td align="center"><apll>LEFT</apll></td>		<td align="center"><apll>LEFT</apll></td>
	</tr>		</tr>

	<tr>		<tr>
	<td align="center">6</td>		<td align="center">7</td>
	<td align="center"><apll>RIGHT</apll></td>		<td align="center"><apll>RIGHT</apll></td>
	</tr>		</tr>

2015-04-17T21:12:21Z

← Older revision		Revision as of 17:12, 17 April 2015
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	<tr>		<tr>
	<th valign="top"><apll>⎕IC</apll> Index<br />(origin-0)</th>		<th valign="top"><apll>⎕IC</apll> Index<br />(origin-0)</th>
	<th valign="top">Indeterminate<br />Calculation</th>		<th valign="top">Indeterminate<br />or Infinite Calculation</th>
	<th valign="top">Default<br />Result</th>		<th valign="top">Default<br />Result</th>
	</tr>		</tr>
	<tr>		<tr>
	<td align="center">0</td>		<td align="center">0</td>
	<td align="center"><apll>÷0</apll> ~~and~~ <apll>L÷0</apll> for <apll>L≠0</apll></td>		<td align="center"><apll>÷0</apll> or <apll>L÷0</apll> for <apll>L≠0</apll></td>
	<td align="center"><apll>∞</apll></td>		<td align="center"><apll>∞</apll></td>
	</tr>		</tr>

2015-04-17T21:09:45Z

← Older revision		Revision as of 17:09, 17 April 2015
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	<tr>		<tr>
	<td align="center">2</td>		<td align="center">2</td>
	<td align="center"><apll>!N</apll> for integer <apll>N<0</apll></td>		<td align="center"><apll>!R</apll> for integer <apll>R<0</apll></td>
	<td align="center"><apll>DOMAIN ERROR</apll></td>		<td align="center"><apll>DOMAIN ERROR</apll></td>
	</tr>		</tr>
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	<tr>		<tr>
	<td align="center">27</td>		<td align="center">27</td>
	<td align="center"><apll>~~0⍟N~~</apll> for <apll>~~N≠0~~ 1</apll></td>		<td align="center"><apll>0⍟R</apll> for <apll>R≠0 1</apll></td>
	<td align="center"><apll>DOMAIN ERROR</apll></td>		<td align="center"><apll>DOMAIN ERROR</apll></td>
	</tr>		</tr>