指数表記 - Wikipedia
任意の有理数を、次の形式で表現する[2]。負の数の場合は、先頭にマイナス符号を付ける。 m × 10n m は有理数、n は整数である。m を仮数部 (mantissa)、n を指数部 (exponent) と呼ぶ。 例えば、 6.02214076×1023 アボガドロ定数（単位: mol−1） 6.62607015×10−34 プランク定数 （単位: J s） −9.2847647043×10−24 電子の磁気モーメント（単位: J⋅T−1） 仮数部 (m) には通常有限小数を用い、小数部は3桁ごとにスペース（正確には thin space）を挟むのが通例である。ただし、小数点の後の数字列が4桁の場合やスペースの後の数字列が4桁の場合は、1桁だけ分けるためのスペースを挿入しないのが普通である[3][4]。 例えば、 7.2973525693×10−3 微細構造定数（無次元量） E表記[編
Power of two - Wikipedia
Visualization of powers of two from 1 to 1024 (20 to 210) as base-2 Dienes blocks A power of two is a number of the form 2n where n is an integer, that is, the result of exponentiation with number two as the base and integer n as the exponent. Powers of two with non-negative exponents are integers: 20 = 1, 21 = 2, and 2n is two multiplied by itself n times.[1][2] The first ten powers of 2 for non-
Ordinal numeral - Wikipedia
In linguistics, ordinal numerals or ordinal number words are words representing position or rank in a sequential order; the order may be of size, importance, chronology, and so on (e.g., "third", "tertiary"). They differ from cardinal numerals, which represent quantity (e.g., "three") and other types of numerals. In traditional grammar, all numerals, including ordinal numerals, are grouped into a
Fraction - Wikipedia
A cake with one quarter (one fourth) removed. The remaining three fourths are shown by dotted lines and labeled by the fraction 1/4 A fraction (from Latin: fractus, "broken") represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, three-quarters
Ruby Best Practices - The Complete Numeric Class
As announced in the previous article we will look at a complete number class today. I will use the example of a integer number which, when printed, will show up as hex number (as opposed to the decimal presentation of Fixnum and relatives). As before the main point is not sophisticated logic or usefulness of the class. Instead I will keep the logic simple so we can focus on the aspects I try to co
リテラル (Ruby 3.3 リファレンスマニュアル)
[edit] 数値リテラル 文字列リテラル バックスラッシュ記法 式展開 文字リテラル コマンド出力 ヒアドキュメント (行指向文字列リテラル) 正規表現リテラル 配列式 ハッシュ式 範囲オブジェクト シンボル %記法 数字の1や文字列"hello world"のようにRubyのプログラムの中に直接記述できる値の事をリテラルといいます。 数値リテラル 123 0d123 整数 -123 符号つき整数 123.45 浮動小数点数。 .1 など "." で始まる浮動小数点数は許されなくなりました。0.1 と書く必要があります。 1.2e-3 浮動小数点数 0xffff 16進整数 0b1011 2進整数 0377 0o377 8進整数 42r 3.14r 有理数。ただし、誤解を招く恐れがあるため、6.022e+23r のような指数部に有理数リテラルを含む形式は指定できません。 42i 3.14
Binary number - Wikipedia
A binary number is a number expressed in the base-2 numeral system or binary numeral system, a method of mathematical expression which uses only two symbols: typically "0" (zero) and "1" (one). The base-2 numeral system is a positional notation with a radix of 2. Each digit is referred to as a bit, or binary digit. Because of its straightforward implementation in digital electronic circuitry using
Hexadecimal - Wikipedia
In mathematics and computing, the hexadecimal (also base-16 or simply hex) numeral system is a positional numeral system that represents numbers using a radix (base) of sixteen. Unlike the decimal system representing numbers using ten symbols, hexadecimal uses sixteen distinct symbols, most often the symbols "0"–"9" to represent values 0 to 9 and "A"–"F" (or "a"–"f") to represent values from ten t
Numeral system - Wikipedia
Numbers written in different numeral systems A numeral system is a writing system for expressing numbers; that is, a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner. The same sequence of symbols may represent different numbers in different numeral systems. For example, "11" represents the number eleven in the decimal numeral syste
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Power of 10 - Wikipedia
Cardinal numeral - Wikipedia
http://www.minituku.net/drills/282479059/questions/749607003/result?choice=67241319&locale=ja
Octal - Wikipedia