Introduction The Syntax Analysis phase is also called Parsing. Definition Syntax Analysis is the second layer/phase of a compiler, in which the parser analyzes the sequence of tokens produced by the lexical analyzer phase to determine whether the input program (created tokens) follows the grammar rules of a programming language Read more…
Introduction Lexical Analysis is the first layer/phase of a compiler. The Lexical Analysis phase is also called Scanning. A Pattern in this phase is a rule (often expressed with regular expressions) that defines how lexemes are recognized as tokens. A Lexeme in this phase is the actual string of characters Read more…
The structure of a compiler is organized into multiple phases, each responsible for transforming source code step by step into machine code. [A.] At a broad level, compilers consist of several phases – (a.) Lexical Analysis Phase (b.) Syntax Analysis Phase (c.) Semantic Analysis Phase (d.) Intermediate Code Generation (e.) Read more…
History Early Beginnings (1940s–1950s) The history of compilers started in the late 1940s with early ideas for automatic programming. In 1949–1951, Heinz Rutishauser proposed Superplan, a high-level language with an automatic translator, refined by Friedrich L. Bauer and Klaus Samelson. Grace Hopper coined the term “compiler” in 1952 for her Read more…
Introduction When designing digital systems, especially for the first time, such as calculators, computers, and communication devices, we often start with complex Boolean expressions that involve several variables and gates. These expressions can be simplified using specific techniques later, allowing the same logical function to be performed using fewer gates Read more…
History The concept of flip-flops dates back to the early days of electronics. The idea behind bistable circuits (flip-flop) dates back to early 20th-century electronics. The first practical bistable multivibrator flip-flop circuit was invented by William Eccles and F. W. Jordan in 1918, and it was called the Eccles–Jordan trigger Read more…
Python offers several ways to create GUI (Graphical User Interface) user-friendly applications. Some of the most popular Python libraries are used for building GUI applications:- Tkinter (Built-in GUI Library) This library is already included with/pre-installed with Python/built into Python (no extra installation is needed). This is simple, easy, and lightweight. Read more…
Example : A basic Expression program in AJS to evaluate operation. Example : An AJS program to handle Object Expression.
Introduction File handling in Python allows us to read, write, and manipulate files (text or binary) stored on our system. Python provides several built-in functions to work with files, such as open(), remove(), write(), etc. Definition A file in Python is a storage unit on a computer where data can Read more…