PL/0语言是一种类PASCAL语言，是教学用程序设计语言，它比PASCAL语言简单，作了一些限制。PL/0的程序结构比较完全，赋值语句作为基本结构，构造概念有

 　　顺序执行、条件执行和重复执行，分别由begin/end,if then else和while do语句表示。

 　　PL0还具有子程序概念，包括过程说明和过程调用语句。

 　　在数据类型方面，PL0只包含唯一的整型，可以说明这种类型的常量和变量。

 　　运算符有+，-，*，/，=，<>，<，>，<=，>=，(，)。

 　　说明部分包括常量说明、变量说明和过程说明。

-PL/0 language is a type PASCAL language, teaching programming language, it is simpler than the PASCAL language, he made some restrictions. Program Structure PL/0 is relatively complete assignments as a basic structure, constructed concepts 　sequential execution, conditional execution and repeated, respectively, by begin/end, if then else and while do statement indicates. 　PL0 also has a subroutine concept, including process descr iptions and procedure call statements. 　In terms of data types, PL0 only contains a unique integer that can explain this type of constants and variables. 　operators are+,-,*, /, =, < > , < ,> , < =,>　=, (,). 　Constant Descr iption Descr iption section include variable descr iptions and process descr iptions.