An intelligible presentation of the essence of the Pascal programming language is given, and using its example, the basic conceptual concepts included in almost any procedural programming language are brought to the reader. The use of the language's capabilities, including for working with complex data structures, is illustrated by a large number of complete examples. Some general methodological aspects of modern programming are also touched upon - methods of program development, their documentation, structured programming. Corresponds to the latest generation Federal State Educational Standard for Secondary Professional Education. Recommended for mastering professions from the list of TOP-50 most in demand on the labor market, new and promising professions. For school and college students , specialized in the field of programming, as well as university students, programmers, and computer science specialists. The educational material can be used in various programming courses.