Scalar System Variables - Revision history

WikiSysop at 16:32, 26 May 2013

2013-05-26T16:32:47Z

← Older revision		Revision as of 12:32, 26 May 2013
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	<p>The System Variables (<apll>⎕CT</apll>, <apll>⎕DT</apll>, <apll>⎕FPC</apll>, <apll>⎕IC</apll>, <apll>⎕IO</apll>, <apll>⎕PP</apll>, <apll>⎕PW</apll>, and <apll>⎕RL</apll>) when assigned to (<apll>~~⎕PP←R~~</apll>), have two properties beyond the ones in their description in the Extended APL Standard.</p>		<p>The System Variables (<apll>⎕CT</apll>, <apll>⎕DT</apll>, <apll>⎕FPC</apll>, <apll>⎕IC</apll>, <apll>⎕IO</apll>, <apll>⎕PP</apll>, <apll>⎕PW</apll>, and <apll>⎕RL</apll>) when assigned to (<apll>⎕FPC←R</apll>), have two properties beyond the ones in their description in the Extended APL Standard.</p>

	<ul>		<ul>
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	<apll>		<apll>
	~~⎕PP←33~~.3<br />		⎕FPC←33.3<br />
	~~⎕PP~~<br />		⎕FPC<br />
	17<br />		53<br />
	⎕CT←¯2<br />		⎕CT←¯2<br />
	⎕CT<br />		⎕CT<br />
Line 26:		Line 26:
	⎕CT←''<br />		⎕CT←''<br />
	⎕CT<br />		⎕CT<br />
	~~3.0E¯15~~<br />		3E¯15<br />
	</apll>		</apll>
	</li>		</li>

WikiSysop at 16:22, 26 May 2013

2013-05-26T16:22:00Z

← Older revision		Revision as of 12:22, 26 May 2013
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	<p>The ~~Scalar~~ System Variables (<apll>⎕CT</apll>, <apll>~~⎕IO~~</apll>, <apll>⎕FPC</apll>, <apll>⎕PP</apll>, <apll>⎕PW</apll>, and <apll>⎕RL</apll>) when assigned to (<apll>⎕PP←R</apll>), have two properties beyond the ones in their description in the Extended APL Standard.</p>		<p>The System Variables (<apll>⎕CT</apll>, <apll>⎕DT</apll>, <apll>⎕FPC</apll>, <apll>⎕IC</apll>, <apll>⎕IO</apll>, <apll>⎕PP</apll>, <apll>⎕PW</apll>, and <apll>⎕RL</apll>) when assigned to (<apll>⎕PP←R</apll>), have two properties beyond the ones in their description in the Extended APL Standard.</p>

	<ul>		<ul>
	<li><p>If a number to be assigned to any of the ~~scalar~~ system variables is out of the normal range for that variable, it is automatically range-limited, meaning if the number is too high, the highest valid number is used, if it is too low, the lowest valid number is used, and if the input is fractional and the normal range is integral, the ceiling of the input is used and then limited at the top or bottom as necessary. This way, you don't need to know the limits of a scalar system variable, and won't signal a <apll>DOMAIN ERROR</apll> by using a value out of range.</p>		<li><p>If a number to be assigned to any of the above system variables is out of the normal range for that variable, it is automatically range-limited, meaning if the number is too high, the highest valid number is used, if it is too low, the lowest valid number is used, and if the input is fractional and the normal range is integral, the ceiling of the input is used and then limited at the top or bottom as necessary. This way, you don't need to know the limits of a scalar system variable, and won't signal a <apll>DOMAIN ERROR</apll> by using a value out of range.</p>

	<p>For example,</p>		<p>For example,</p>
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	</li>		</li>

	<li><p>If an empty simple vector is assigned to any of the ~~scalar~~ system variables, the default system value is used instead. This way, you can restore the default value without knowing its value.</p>		<li><p>If an empty simple vector is assigned to any of the above system variables, the default system value is used instead. This way, you can restore the default value without knowing its value.</p>

	<p>For example,</p>		<p>For example,</p>

Paul Robinson at 12:17, 22 February 2013

2013-02-22T12:17:48Z

← Older revision		Revision as of 08:17, 22 February 2013
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	</ul>		</ul>

			==See Also==
			* [[System Variables]]
	{{System Variables}}		{{System Variables}}

Paul Robinson: add template

2013-02-22T03:33:45Z

add template

← Older revision		Revision as of 23:33, 21 February 2013
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	</li>		</li>
	</ul>		</ul>

			{{System Variables}}

WikiSysop at 19:57, 18 August 2011

2011-08-18T19:57:23Z

← Older revision		Revision as of 15:57, 18 August 2011
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	<p>The Scalar System Variables (<apll>⎕CT</apll>, <apll>⎕IO</apll>, <apll>⎕PP</apll>, <apll>⎕PW</apll>, and <apll>⎕RL</apll>) when assigned to (<apll>⎕PP←R</apll>), have two properties beyond the ones in their description in the Extended APL Standard.</p>		<p>The Scalar System Variables (<apll>⎕CT</apll>, <apll>⎕IO</apll>, <apll>⎕FPC</apll>, <apll>⎕PP</apll>, <apll>⎕PW</apll>, and <apll>⎕RL</apll>) when assigned to (<apll>⎕PP←R</apll>), have two properties beyond the ones in their description in the Extended APL Standard.</p>

	<ul>		<ul>

WikiSysop at 14:23, 8 July 2008

2008-07-08T14:23:46Z

← Older revision		Revision as of 10:23, 8 July 2008
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	<ul>		<ul>
	<li><p>If a number to be assigned to any of the scalar system variables is out of the normal range for that variable, it is automatically range-limited, meaning if the number is too high, the highest valid number is used, ~~and~~ if it is too low, the lowest valid number is used. This way, you don't need to know the limits of a scalar system variable, and won't signal a <apll>DOMAIN ERROR</apll> by using a value out of range.</p>		<li><p>If a number to be assigned to any of the scalar system variables is out of the normal range for that variable, it is automatically range-limited, meaning if the number is too high, the highest valid number is used, if it is too low, the lowest valid number is used, and if the input is fractional and the normal range is integral, the ceiling of the input is used and then limited at the top or bottom as necessary. This way, you don't need to know the limits of a scalar system variable, and won't signal a <apll>DOMAIN ERROR</apll> by using a value out of range.</p>

	<p>For example,</p>		<p>For example,</p>

Sudleyplace: New page:
The Scalar System Variables (⎕CT, ⎕IO, ⎕PP, ⎕PW, and ⎕RL) when assigned to (⎕PP←R), have two ...

2008-05-08T03:00:04Z

New page: The Scalar System Variables (<apll>⎕CT</apll>, <apll>⎕IO</apll>, <apll>⎕PP</apll>, <apll>⎕PW</apll>, and <apll>⎕RL</apll>) when assigned to (<apll>⎕PP←R</apll>), have two ...

New page

The Scalar System Variables (<apll>⎕CT</apll>, <apll>⎕IO</apll>, <apll>⎕PP</apll>, <apll>⎕PW</apll>, and <apll>⎕RL</apll>) when assigned to (<apll>⎕PP←R</apll>), have two properties beyond the ones in their description in the Extended APL Standard.

<ul>
<li>If a number to be assigned to any of the scalar system variables is out of the normal range for that variable, it is automatically range-limited, meaning if the number is too high, the highest valid number is used, and if it is too low, the lowest valid number is used. This way, you don't need to know the limits of a scalar system variable, and won't signal a <apll>DOMAIN ERROR</apll> by using a value out of range.

For example,

<apll>
     ⎕PP←33.3 
     ⎕PP 
17 
     ⎕CT←¯2 
     ⎕CT 
0 
</apll>
</li>

<li>If an empty simple vector is assigned to any of the scalar system variables, the default system value is used instead. This way, you can restore the default value without knowing its value.

For example,

<apll>
     ⎕PP←⍬ 
     ⎕PP 
10 
     ⎕CT←'' 
     ⎕CT 
3.0E¯15 
</apll>
</li>
</ul>