There are currently about eight thousand languages programming, and some are not like the others.
In the introduction, you can talk about the historical retrospective for a long time subject, about its connection with related disciplines, significance for life modern society, etc. All these aspects are important, but how it seems to the author, at the very beginning it is better to immerse the reader in the essence what he has to learn. Get an idea of the subject a set of examples - semantically equivalent programs can help (more about what syntax and semantics are, will be discussed further), which do the same thing, being executed on a computer, equipped with appropriate means. The programs look on these languages in different ways. Following the example of Lawrence Tesler [1, p. 76], we use for illustration not the trivial example "Hello, world!", but
counting the sum of the odd numbers included in the sequence whole numbers. So let's move on to examples
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