U+230A Left Floor
U+230A was added in Unicode version 1.1 in 1993. It belongs to the block
This character is a Open Punctuation and is commonly used, that is, in no specific script. The character is also known as APL downstile.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is mirrored into
The Wikipedia has the following information about this codepoint:
In mathematics, the floor function (or greatest integer function) is the function that takes as input a real number x, and gives as output the greatest integer less than or equal to x, denoted ⌊x⌋ or floor(x). Similarly, the ceiling function maps x to the smallest integer greater than or equal to x, denoted ⌈x⌉ or ceil(x).
For example, for floor: ⌊2.4⌋ = 2, ⌊−2.4⌋ = −3, and for ceiling: ⌈2.4⌉ = 3, and ⌈−2.4⌉ = −2.
Historically, the floor of x has been–and still is–called the integral part or integer part of x, often denoted [x] (as well as a variety of other notations). However, the same term, integer part, is also used for truncation towards zero, which differs from the floor function for negative numbers.
For n an integer, ⌊n⌋ = ⌈n⌉ = [n] = n.
Although floor(x+1) and ceil(x) produce graphs that appear exactly alike, they are not the same when the value of x is an exact integer. For example, when x=2.0001; ⌊2.0001+1⌋ = ⌈2.0001⌉ = 3. However, if x=2, then ⌊2+1⌋ = 3, while ⌈2⌉ = 2.
Representations
System  Representation 

Nº  8970 
UTF8  E2 8C 8A 
UTF16  23 0A 
UTF32  00 00 23 0A 
URLQuoted  %E2%8C%8A 
HTML hex reference  ⌊ 
Wrong windows1252 Mojibake  âŒŠ 
HTML named entity  ⌊ 
HTML named entity  ⌊ 
alias  APL downstile 
L^{A}T_{E}X  \lfloor 
digraph  7< 
Related Characters
Elsewhere
Complete Record
Property  Value 

1.1 (1993)  
LEFT FLOOR  
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Miscellaneous Technical  
Open Punctuation  
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