System Function A: Difference between revisions

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<h1>{quad}A - Return Uppercase Alphabet</h1>
<h1>{quad}A - Return English Alphabet</h1>
{{BoxStart  
{{BoxStart  
|<apll>Z←⎕A</apll>
|<apll>Z←⎕A</apll>
|returns the 26-character uppercase English alphabet.}}
|returns the 26-character uppercase English alphabet.}}
{{BoxEnd|<apll>Z</apll> is the character vector <apll>'ABCDEFGHIJKLMNOPQRSTUVWXYZ'</apll>.}}
{{BoxEnd|<apll>Z</apll> is the character vector <apll>'ABCDEFGHIJKLMNOPQRSTUVWXYZ'</apll>.}}
The variable is not case sensitive, so <big>⎕A</big> or <big>⎕a</big> may be used. {quad}A may be used as any other string, including referencing individual letters.  For example:<br/>
The name is case sensitive, so <apll>⎕A</apll> is different from <apll>⎕a</apll> which returns <apll>'abcdefghijklmnopqrstuvwxyz'</apll>.  There are also ten other variations on this system function each of returns either the lower- or upper-case accented alphabet such as <apll>⎕á ⎕Á ⎕à ⎕À ⎕â ⎕Â ⎕ä ⎕Ä ⎕ã ⎕Ã</apll>. For example:
<code>
 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;⎕a[8 5 12 12 15]<br/>
<apll>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;⍪⎕a ⎕á ⎕à ⎕â ⎕ä ⎕ã<br/>
&nbsp;abcdefghijklmnopqrstuvwxyz <br/>
&nbsp;ábćdéfǵhíjḱĺḿńóṕqŕśtúvẃxýź <br/>
&nbsp;àbcdèfghìjklmǹòpqrstùvẁxỳz <br/>
&nbsp;âbĉdêfĝĥîĵklmnôpqrstuvwxyz <br/>
&nbsp;äbcdëfgḧïjklmnöpqrsẗüvẅẍÿz <br/>
&nbsp;ãbcdẽfghĩjklmñõpqrstũṽwxỹz<br/>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;⍪⎕A ⎕Á ⎕À ⎕Â ⎕Ä ⎕Ã<br/>
&nbsp;ABCDEFGHIJKLMNOPQRSTUVWXYZ <br/>
&nbsp;ÁBĆDÉFǴHÍJḰĹḾŃÓṔQŔŚTÚVẂXÝŹ <br/>
&nbsp;ÀBCDÈFGHÌJKLMǸÒPQRSTÙVẀXỲZ <br/>
&nbsp;ÂBĈDÊFĜĤÎĴKLMNÔPQRŜTÛVŴXŶẐ <br/>
&nbsp;ÄBCDËFGḦÏJKLMNÖPQRSTÜVẄẌŸZ <br/>
&nbsp;ÃBCDẼFGHĨJKLMÑÕPQRSTŨṼWXỸZ<br/>
</apll>
 
The result of <apll>⎕A</apll> may be used as any other string, including referencing individual letters.  For example:<br/>
<apll>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;⎕A[8 5 12 12 15]<br/>
HELLO<br/>
HELLO<br/>
</code>
</apll>





Revision as of 04:42, 1 March 2017

⎕A - Return English Alphabet

Z←⎕A returns the 26-character uppercase English alphabet.
Z is the character vector 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.

The name is case sensitive, so ⎕A is different from ⎕a which returns 'abcdefghijklmnopqrstuvwxyz'. There are also ten other variations on this system function each of returns either the lower- or upper-case accented alphabet such as ⎕á ⎕Á ⎕à ⎕À ⎕â ⎕Â ⎕ä ⎕Ä ⎕ã ⎕Ã. For example:

      ⍪⎕a ⎕á ⎕à ⎕â ⎕ä ⎕ã
 abcdefghijklmnopqrstuvwxyz
 ábćdéfǵhíjḱĺḿńóṕqŕśtúvẃxýź
 àbcdèfghìjklmǹòpqrstùvẁxỳz
 âbĉdêfĝĥîĵklmnôpqrstuvwxyz
 äbcdëfgḧïjklmnöpqrsẗüvẅẍÿz
 ãbcdẽfghĩjklmñõpqrstũṽwxỹz
      ⍪⎕A ⎕Á ⎕À ⎕Â ⎕Ä ⎕Ã
 ABCDEFGHIJKLMNOPQRSTUVWXYZ
 ÁBĆDÉFǴHÍJḰĹḾŃÓṔQŔŚTÚVẂXÝŹ
 ÀBCDÈFGHÌJKLMǸÒPQRSTÙVẀXỲZ
 ÂBĈDÊFĜĤÎĴKLMNÔPQRŜTÛVŴXŶẐ
 ÄBCDËFGḦÏJKLMNÖPQRSTÜVẄẌŸZ
 ÃBCDẼFGHĨJKLMÑÕPQRSTŨṼWXỸZ

The result of ⎕A may be used as any other string, including referencing individual letters. For example:
      ⎕A[8 5 12 12 15]
HELLO



Note: A is a niladic form system function, you cannot assign a value to it.

System Variables (A value may be assigned to these except for ⎕DM)
ALX CT DM DT ELX FC FEATURE FPC IC IO
LR LX PP PR PW RL SA WSID
Niladic System Functions (a value cannot be assigned to these)
A AV EM ET LC NNAMES NNUMS SI SYSID SYSVER
T TC TCBEL TCBS TCESC TCFF TCHT TCLF TCNL TCNUL
TS WA
Monadic or dyadic system functions (a value cannot be assigned to these)
AT CR DC DFT DL DR EA EC ERROR ES
EX FMT FX MF NAPPEND NC NCREATE NERASE NINFO NL
NLOCK NREAD NRENAME NREPLACE NRESIZE NSIZE NTIE NUNTIE STOP TF
TRACE UCS VR
Note that quad functions and variables (except for the ⎕A family of functions) are case insensitive


See Also
System Commands System Variables and Functions Operators


Keyboard
A+S
Alt ¨ ¯ < > × ÷
Sh ~ ! @ # $ % ^ & * ( ) _ +
Key ` 1 2 3 4 5 6 7 8 9 0 - =
A+S
Alt ? § π
Sh Q W E R T Y U I O P { } |
Key q w e r t y u i o p [ ] \
A+S
Alt
Sh A S D F G H J K L : "
Key a s d f g h j k l ; '
A+S χ
Alt
Sh Z X C V B N M < > ?
Key z x c v b n m , . /
NARS 2000 Lang
Tool
Bar
+ - × ÷ * ! ? |
< = >
~ § π .. ,
/ \ ¨ .
_ ¯
Second Row i j k i j k l g p r v x



See Also
System Commands System Variables and Functions Operators


Keyboard
A+S
Alt ¨ ¯ < > × ÷
Sh ~ ! @ # $ % ^ & * ( ) _ +
Key ` 1 2 3 4 5 6 7 8 9 0 - =
A+S
Alt ? § π
Sh Q W E R T Y U I O P { } |
Key q w e r t y u i o p [ ] \
A+S
Alt
Sh A S D F G H J K L : "
Key a s d f g h j k l ; '
A+S χ
Alt
Sh Z X C V B N M < > ?
Key z x c v b n m , . /
NARS 2000 Lang
Tool
Bar
+ - × ÷ * ! ? |
< = >
~ § π .. ,
/ \ ¨ .
_ ¯
Second Row i j k i j k l g p r v x

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