Numeral (source code)
= Numeral
A <numeral> is a written expression representing a <number>. The <number> five can be written as the <decimal> numeral $5$, the <binary> numeral $101_2$, or the <Roman numeral> V. The expressions differ while the represented <integer> is the same.
This distinction matters when an <algorithm> examines <numerical digits>. A <palindromic number>, for example, is defined through its representation in a specified <radix>, rather than through the appearance of an abstract <number>. The <integer> five is a palindrome as the one-digit <decimal> numeral $5$ and as the <binary> numeral $101_2$, whereas ten is written $10$ in <decimal> and $1010_2$ in <binary>, neither of which is a palindrome.
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