The programming language APL is distinctive in being symbolic rather than lexical: its primitives are denoted by symbols, not words. These symbols were originally devised as a mathematical notation to describe algorithms. [ 1 ]

The programming language APL uses a number of symbols, rather than words from natural language, to identify operations, similarly to mathematical symbols. Prior to the wide adoption of Unicode, a number of special-purpose EBCDIC and non-EBCDIC code pages were used to represent the symbols required for writing APL.

APL's syntax refers to the way programs are written—the arrangement of functions and arrays, along with other values, keywords, and punctuation—in contrast to its semantics, that is, the meaning of the actual operations performed.

Glyphs are the individual characters and symbols used in APL, primarily to represent primitive functions and operators. A glyph is distinct from the functionality it represents, and usually has a different name: for example, the dyadic function Take is represented with the glyph Up Arrow .

Unicode was a great start to enabling APL characters to be used, however in order for there to be interoperability, implementors have to agree upon which characters are functional. It doesn't matter if one's system can change the mapping of glyphs to codepoints as the vast majority of users won't change from the default behavior.

APL 语言的符号在单个和两个参数时基本有两种语义，有些比较相关，如三个符号中的 ⍴，都与形状有关。 但 ⍳ 和 ↓ 的两种语义似乎关联不大（？ ）。 前面这种情况还勉强可用单一汉字“形”对应 ⍴，但后面这种情况下似乎很难选取汉字与每个符号进行一一对应。 如果使用不同字词表达同一符号的不同语义，但仍然保留APL语法，即： 那么一种可能的对应中文语法设计如下（暂用两字词语表达，具体用词待商榷，暂以空格分词）： 看起来似乎还可以。 是否有更接近中文 自然语言 …

2017年2月28日 · APL symbols is used by the computer language called APL. Here is a complete list of APL symbols in Unicode.

APL is international in character. It uses symbols instead of words borrowed from natural language (al though some of the symbols are indeed derived from. the Greek alphabet). In this sense, APL is compara ble to traditional notations of mathematics.

How to easily type mathematical APL symbols (⌸ ⌾ ⍋) using Windows Alt codes. Or click any mmathematical APL symbol to copy and paste into your document.

2013年9月28日 · This page is a list of APL symbol's meanings. 1 for elements of A present in B; 0 where not. Create Math APL Keyboard Layout. For full detail, see: APL syntax and symbols. Sample APL source code: apl_cgi_script.apl. ⍝ Variable name conventions: ⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝⍝.