Pascal language syntax

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Each programming language has its own alphabet, consisting of a set of specific symbols. Pascal is no exception. To write code, the developer has access to:

Latin uppercase and lowercase letters;
Arabic numerals;
underscore character;
round, square and curly brackets;
signs of arithmetic operations;
punctuation marks, etc.
In addition to those listed, there are complex symbols consisting of several elementary ones:

:= (assignment operator);
>= and <= (greater than or equal to, less than or equal to);
two symbols * (designating the beginning and end of a comment).
There are also auxiliary constructions, called auxiliary words, which are also part of thailand rcs data the alphabet of the language. They are indivisible and have the form of strictly defined sequences of symbols. Each such auxiliary word has a specific meaning.

Any object in Pascal, be it a variable, constant or other construction, is given a name consisting of numbers, Latin letters and the underscore symbol. When creating a name, the following rule is observed: there cannot be a number at the beginning, and the selected sequence of characters cannot coincide with a service word. The case of letters in Pascal does not matter.