Instruction

of these articles treats instructions in the data processing. To the instruction within the military range, see military instruction. To instruction and obedience as terms of the sociology, see rule.

An instruction is the smallest functional unit when programming a program, which steers a microprocessor. ThatProgram is usually written in a programming language, which combines instruction sequences into functions. The source text written in the programming language is translated by a compiler or an interpreter into machine language, which consists only of the individual instructions in machine-readable form. Assembler languages are not programming languages, those the machine instructionsinto functions combine, but this only one to one in human being-readable form represent.

Instructions can be divided semantically according to the EH principle.

• Input - or output instructions read data in of the keyboard, of a file or from other sources or them give them on the monitor,on a printer or into a file out.
• Computations change data or them again combine data. This also mathematical computations can be, like addition or multiplication.
• Control structures decide due to the available data, which instructions are next implemented. In particular an instruction sequence can be repeated.

During the use of a computer program an instruction is a procedural instruction, which the user gives to the program. With modern programs this takes place usually via serving a graphic user surface with the help of a mouse.

Wiktionary: Instruction - word origin, synonyms and translations