Types of Computer Languages with Their Advantages and Disadvantages
Just as humans use language to
communicate, and different regions have different languages, computers also
have their own languages that are specific to them.
Different kinds of languages have
been developed to perform different types of work on the computer. Basically,
languages can be divided into two categories according to how the computer
understands them.
Two Basic Types of Computer Language
- Low-Level Languages: A language that corresponds directly to a specific machine
- High-Level Languages: Any language that is independent of the machine
There are also other types of
languages, which include
- System languages: These are designed for low-level tasks, like memory and process management
- Scripting languages: These tend to be high-level and very powerful
- Domain-specific languages: These are only used in very specific contexts
- Visual languages: Languages that are not text-based
- Esoteric languages: Languages that are jokes or are not intended for serious use
These languages are not mutually
exclusive, and some languages can belong to multiple categories. The terms
low-level and high-level are also open to interpretation, and some languages
that were once considered high-level are now considered low-level as languages
have continued to develop.
Low-Level Languages
Low-level computer languages are
either machine codes or are very close them. A computer cannot understand
instructions given to it in high-level languages or in English. It can only understand
and execute instructions given in the form of machine language i.e. binary.
There are two types of low-level languages:
- Machine Language: a language that is directly interpreted into the hardware
- Assembly Language: a slightly more user-friendly language that directly corresponds to machine language
Machine Language
Machine language is the lowest and
most elementary level of programming language and was the first type of
programming language to be developed. Machine language is basically the only language
that a computer can understand and it is usually written in hex.
In fact, a manufacturer designs a
computer to obey just one language, its machine code, which is represented
inside the computer by a string of binary digits (bits) 0 and 1. The symbol 0
stands for the absence of an electric pulse and the 1 stands for the presence
of an electric pulse. Since a computer is capable of recognizing electric
signals, it understands machine language.
Advantages
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Disadvantages
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Machine
language makes fast and efficient use of the computer.
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All
operation codes have to be remembered
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It
requires no translator to translate the code. It is directly understood by
the computer.
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All memory
addresses have to be remembered.
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It is hard
to amend or find errors in a program written in the machine language.
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Assembly Language
Assembly language was developed to
overcome some of the many inconveniences of machine language. This is another
low-level but very important language in which operation codes and operands are
given in the form of alphanumeric symbols instead of 0’s and l’s.
These alphanumeric symbols are
known as mnemonic codes and can combine in a maximum of five-letter
combinations e.g. ADD for addition, SUB for subtraction, START, LABEL etc.
Because of this feature, assembly language is also known as ‘Symbolic
Programming Language.'
This language is also very
difficult and needs a lot of practice to master it because there is only a
little English support in this language. Mostly assembly language is used to
help in compiler orientations. The instructions of the assembly language are
converted to machine codes by a language translator and then they are executed
by the computer.
Advantages
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Disadvantages
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Assembly
language is easier to understand and use as compared to machine language.
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Like
machine language, it is also machine dependent/specific.
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It is easy
to locate and correct errors.
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Since it
is machine dependent, the programmer also needs to understand the hardware.
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It is
easily modified.
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High-Level Languages
High-level computer languages use
formats that are similar to English. The purpose of developing high-level
languages was to enable people to write programs easily, in their own native
language environment (English).
High-level languages are basically
symbolic languages that use English words and/or mathematical symbols rather
than mnemonic codes. Each instruction in the high-level language is translated
into many machine language instructions that the computer can understand.
Advantages
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Disadvantages
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High-level
languages are user-friendly
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A
high-level language has to be translated into the machine language by a
translator, which takes up time
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They are
similar to English and use English vocabulary and well-known symbols
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The object
code generated by a translator might be inefficient compared to an equivalent
assembly language program
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They are
easier to learn
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They are
easier to maintain
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They are
problem-oriented rather than 'machine'-based
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A program
written in a high-level language can be translated into many machine
languages and can run on any computer for which there exists an appropriate
translator
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The
language is independent of the machine on which it is used i.e. programs
developed in a high-level language can be run on any computer text
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Types of High-Level Languages
Many languages have been developed
for achieving a variety of different tasks. Some are fairly specialized, and
others are quite general.
These languages, categorized
according to their use, are:
1) Algebraic Formula-Type Processing
These languages are oriented
towards the computational procedures for solving mathematical and statistical
problems.
Examples include:
- BASIC (Beginners All Purpose Symbolic Instruction Code)
- FORTRAN (Formula Translation)
- PL/I (Programming Language, Version 1)
- ALGOL (Algorithmic Language)
- APL (A Programming Language)
2. Business Data Processing
These languages are best able to
maintain data processing procedures and problems involved in handling files.
Some examples include:
- COBOL (Common Business Oriented Language)
- RPG (Report Program Generator)
3. String and List Processing
These are used for string
manipulation, including search patterns and inserting and deleting characters.
Examples are:
- LISP (List Processing)
- Prolog (Program in Logic)
4. Object-Oriented Programming Language
In OOP, the computer program is
divided into objects. Examples are:
- C++
- Java
5. Visual Programming Language
These programming languages are
designed for building Windows-based applications.Examples are:
- Visual Basic
- Visual Java
- Visual C
A Helpful Resource on Computer Languages
This resource was used to help
write this article. It has more information on this topic and goes into more
depth on some of the other kinds of languages and their uses. To get the most
out of it, you should have some knowledge of or background in computer science.
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