Low Level Language

A high-level language is an advanced computer programming language that isn't limited by the computer, designed for a specific job, and is easier to understand.

Today, there are dozens of high-level languages; some examples include BASIC, C, FORTAN, Java, C++ and Pascal. These are independent of the internal machine code of any particular computer.

High-level languages are used to solve problems and are often described as problem-oriented languages; a low-level language is the opposite of a HighLevelLanguage. It is one which exposes a significant amount of the computer's inner workings; for instance, in CeeLanguage, one deals with the concept of memory and pointers, whereas in HaskellLanguage, there is no concept of storing data. This aspect of CeeLanguage is low-level. The lowest-level language is MachineCode, which hides no details of the machine; not even the bit patterns used to form instructions are abstracted.

Low-level languages have the advantage that the programmer is able to tune the code to be smaller or more efficient, and that more system-dependent features are sometimes available. They have the disadvantage that they are often (usually?) harder to program in.

In computing, a low-level programming language is designed for a particular computer and reflects its internal MachineCode; low-level languages are therefore often described as machine-oriented languages. They cannot easily be converted to run on a computer with a different central processing unit, and they are relatively difficult to learn because a detailed knowledge of the internal workings of the computer is required. Since they must be translated into machine code by an assembler program, low-level languages are also called AssemblyLanguages.

A mnemonic-based low-level language replaces binary machine-code instructions, which are very hard to remember, write down, or correct, with short codes (mnemonics) chosen to remind the programmer of the instructions they represent. For example, the binary-code instruction that means ‘store the contents of the accumulator’ may be represented with the mnemonic STA (STore to Acummulator).

In contrast, high-level languages are designed to solve particular problems and are therefore described as problem-oriented languages: for example, BASIC was designed to be easily learnt by first-time programmers; COBOL is used to write programs solving business problems; and FORTRAN is used for programs solving scientific and mathematical problems.

See also: HighLevelLanguage

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