Lua笔记（19）—— 表达式（expression）和语句（statement）

Lua中的表达式（expression）定义：

Expressions denote values. Expressions in Lua include the numeric constants and string literals, variables, unary and binary operations, and function calls. Expressions include also the unconventional function definitions and table constructors.

表达式产生值，包括：数字常量，字符串，变量，单目和双目运算，另外还有函数调用。此外，表达式还包括函数定义和创建table。

Lua中的语句（statement）定义：

Lua supports an almost conventional set of statements, similar to those in C or Pascal. The conventional statements include assignment, control structures, and procedure calls. Lua also supports some not so conventional statements, such as multiple assignments and local variable declarations.

语句包括：赋值，控制结构，过程调用（block），多重赋值和local变量定义。