Symbol Zilde

From NARS2000
(Redirected from )
Jump to navigationJump to search

⍬ — Represents an empty numeric vector or zero plus tilde (hence zilde) — Keystroke Alt + Shift + } — Character

Usage

      ⌊/⍬


      ⌈/⍬
¯∞


Symbolically zero or 0 represents number while tilde or represents not. Together the overstrike zilde symbol or means not a number, i.e. empty numeric vector. APL frequently uses overstrike characters in dual-combined meaning, thus which is or prompt and the single quote symbol yielding prompt for string or character input versus or prompt for numeric input.

Example

The above examples for infinity and negative infinity correctly run in NARS2000. In theory ONLY - ⍬ would be hypothetically equivalent to ⍳0 or 0⍴N (where N is any number) since zilde or ⍬ represents an empty numeric vector.

See Also

Infinity



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
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