Syntax of a Ratio

ToC

Allegro CL

2 Syntax

2.3 Interpretation of Tokens

2.3.2 Constructing Numbers from Tokens

2.3.2.1 Syntax of a Rational

2.3.2.1.2 Syntax of a Ratio

Ratios can be written as an optional sign followed by two non-empty sequences of digits separated by a slash; see Figure 2.3.1 Numbers as Tokens. The second sequence may not consist entirely of zeros. Examples of ratios are in the next figure.

Examples of Ratios
`2/3`	;This is in canonical form
`4/6`	;A non-canonical form for 2/3
`-17/23`	;A ratio preceded by a sign
`-30517578125/32768`	;This is (-5/2)¹⁵
`10/5`	;The canonical form for this is `2`
`#o-101/75`	;Octal notation for -65/61
`#3r120/21`	;Ternary notation for 15/7
`#Xbc/ad`	;Hexadecimal notation for 188/173
`#xFADED/FACADE`	;Hexadecimal notation for 1027565/16435934

For information on how ratios are printed, see Section 22.1.3.1.2 Printing Ratios.