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Introduced in Python 2.2 as an optional feature and finalized in version 2.3, generators are Python's mechanism for lazy evaluation of a function that would otherwise return a space-prohibitive or computationally intensive list. This is an example to lazily generate the prime numbers:
Switch statements come in two main variants: a structured switch, as in Pascal, which takes exactly one branch, and an unstructured switch, as in C, which functions as a type of goto. The main reasons for using a switch include improving clarity, by reducing otherwise repetitive coding, and (if the heuristics permit) also offering the potential ...
For a value of 1 it would return "one". For a value of 2 it would return "two". For the values 3, 4 or 5 it would return "range 3–5". For any other value, or a null value, it would return "other". However, in many cases, the #switch function is a multi-line form, with each branch on a different line, as follows:
In computer programming, the act of swapping two variables refers to mutually exchanging the values of the variables. Usually, this is done with the data in memory. For example, in a program, two variables may be defined thus (in pseudocode): data_item x := 1 data_item y := 0 swap (x, y);
PHP's role as the LAMP's application programming language has also been performed by other languages such as Perl and Python. PHP is a server-side scripting language designed for web development but also used as a general-purpose programming language.
IPython (Interactive Python) is a command shell for interactive computing in multiple programming languages, originally developed for the Python programming language, that offers introspection, rich media, shell syntax, tab completion, and history. IPython provides the following features: Interactive shells (terminal and Qt-based).
As of 21 November 2024 (the day of PHP 8.4's release), PHP is used as the server-side programming language on 75.4% of websites where the language could be determined; PHP 7 is the most used version of the language with 49.1% of websites using PHP being on that version, while 37.9% use PHP 8, 12.9% use PHP 5 and 0.1% use PHP 4.
In computing, a command is a directive to a computer program to perform a specific task. It may be issued via a command-line interface or as input to a network service as part of a network protocol, or as an event triggered in a graphical user interface. Specifically, the term command is used in imperative programming languages.