Execution in computer Computer engineering (also called electronic and computer engineering, computer science & engineering, or computer systems engineering) is a discipline that combines both electrical or electronic engineering (the terms vary in different parts of the world) and computer science. Computer engineers usually have training in electronic engineering, and software engineering Software engineering is a profession and field of study dedicated to designing, implementing, and modifying software so that it is of higher quality, more affordable, maintainable, and faster to build. The term software engineering first appeared in the 1968 NATO Software Engineering Conference, and was meant to provoke thought regarding the is the process In computing, a process is an instance of a computer program that is being executed. It contains the program code and its current activity. Depending on the operating system , a process may be made up of multiple threads of execution that execute instructions concurrently by which a computer A computer is a programmable machine that receives input, stores and manipulates data//information, and provides output in a useful format or a virtual machine A virtual machine is a software implementation of a machine (i.e. a computer) that executes programs like a physical machine carries out the instructions of a computer program A computer program is a sequence of instructions written to perform a specified task for a computer. A computer requires programs to function, typically executing the program's instructions in a central processor. The program has an executable form that the computer can use directly to execute the instructions. The same program in its human-. The instructions in the program trigger sequences of simple actions on the executing machine. Those actions produce effects according to the semantics In theoretical computer science, formal semantics is the field concerned with the rigorous mathematical study of the meaning of programming languages and models of computation of the instructions in the program.
Programs for a computer may execute in a batch process Batch processing is execution of a series of programs on a computer without manual intervention without human interaction, or a user may type commands In computing, a command is a directive to a computer program acting as an interpreter of some kind, in order to perform a specific task. Most commonly a command is a directive to some kind of command line interface, such as a shell in an interactive session In computer science, in particular networking, a session is a semi-permanent interactive information interchange, also known as a dialogue, a conversation or a meeting, between two or more communicating devices, or between a computer and user . A session is set up or established at a certain point in time, and torn down at a later point in time of an interpreter In computer science, an interpreter normally means a computer program that executes, i.e. performs, instructions written in a programming language. An interpreter may be a program that either. In this case the "commands" are simply programs, whose execution is chained together.
The term run is used almost synonymously. A related meaning of both "to run" and "to execute" refers to the specific action of a user starting (or launching or invoking) a program, as in "Please run the ... application."
Context of execution
The context in which execution takes place is crucial. Very few programs execute on a bare machine. Programs usually contain implicit and explicit assumptions about resources available at the time of execution. Most programs execute with the support of an operating system An operating system is the software on a computer that manages the way different programs use its hardware, and regulates the ways that a user controls the computer. Operating systems are found on almost any device that contains a computer with multiple programs—from cellular phones and video game consoles to supercomputers and web servers. Some and run-time libraries In computer programming, a runtime library is a special program library used by a compiler, to implement functions built into a programming language, during the runtime of a computer program. This often includes functions for input and output, or for memory management specific to the source language that provide crucial services not supplied directly by the computer itself. This supportive environment, for instance, usually decouples a program from direct manipulation of the computer peripherals, providing more general, abstract services instead. ===Interpreter=== A system that executes a program is called an interpreter In computer science, an interpreter normally means a computer program that executes, i.e. performs, instructions written in a programming language. An interpreter may be a program that either of the program. Loosely speaking, an interpreter actually does what the program says to do. This contrasts with to a language translator that converts a program from one language to another. The most common language translators are compilers A compiler is a computer program that transforms source code written in a programming language (the source language) into another computer language (the target language, often having a binary form known as object code). The most common reason for wanting to transform source code is to create an executable program. Translators typically convert their source
See also
- Invocational media
- runtime A run-time system is a collection of software designed to support the execution of computer programs written in some computer language. The run-time system may provide software services such as subroutines and libraries for common operations, implementation of programming language commands, type checking, debugging, and even code generation and
