scala基本数据类型学习

Scala数值与字符串字面量解析

最新推荐文章于 2025-01-08 00:31:51 发布

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最新推荐文章于 2025-01-08 00:31:51 发布

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文章标签： scala 开发工具

原文链接：http://www.cnblogs.com/25th-engineer/p/11255876.html

本文深入探讨Scala中不同类型的数值字面量和字符串字面量的使用规则，包括整数、浮点数、字符及字符串的表示方法，特别关注了八进制数、长整型、双精度浮点数、Unicode字符以及原始字符串的语法细节。

　　Scala does not support octal literals; integer literals that start with a 0, such as 031, do not compile.

　　If an integer literal ends in an L or l, it is a Long; otherwise it is an Int.

　　If a floating-point literal ends in an F or f, it is a Float; otherwise it is a Double. Optionally, a Double floating-point literal can end in D or d.

　　Character literals are composed of any Unicode character between single quotes.

　　In addition to providing an explicit character between the single quotes, you can identify a character using its Unicode code point. To do so, write \u followed by

four hex digits with the code point, like this:

　　scala> val d = '\u0041'

　　d: Char = A

　　scala> val f = '\u0044'

　　f: Char = D　　

　　This identifier is treated as identical to BAD, the result of expanding the two Unicode characters in the code above. In general, it is a bad idea to name

identifiers like this because it is hard to read. Rather, this syntax is intended to allow Scala source files that include non-ASCII Unicode characters to

be represented in ASCII.

　　A string literal is composed of characters surrounded by double quotes.

　　You start and end a raw string with three double quotation marks in a row ("""). The interior of a raw string may contain any characters whatsoever, including

newlines, quotation marks, and special characters, except of course three quotes in a row.

转载于:https://www.cnblogs.com/25th-engineer/p/11255876.html