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in machine dependent language runs only on one particular type of computer. There are two

                  categories of low-level languages:
                  Machine Language


                  Machine language is the only language understood by the computer. It is also known as the
                  first generation language (1GL). Machine language is very difficult for programmers to use
                  because it only consists of two digits,  0 and  1, called binary digits or bits. Where the bit '0'
                  represents the OFF state and the bit '1' represents the ON state.
                  Assembly Language


                  Assembly language is also known as second generation language (2GL). It is the language
                  in which program codes are written in the form of alphanumeric symbols called ‘Mnemonics’
                  instead of 0 and 1. In the assembly language, a programmer writes abbreviations such as A for
                  addition, C for compare, L for load, and M for multiply. Because of this feature, it is also known
                  as ‘Symbolic Language‘.

                  High-Level Language (HLL)

                  High-level language is a programming language that enables a programmer to write programs
                  that are machine independent. This type of languages are considered as high-level languages
                  because they are closer to human languages and away from machine languages.

                  The main advantages of high-level languages over low-level languages is that they are easier to
                  read, write and maintain. Let's discuss about some high-level languages.
                  Third Generation Languages (3GL)


                  In third generation languages (3GL), the programmer writes a series of English like words that
                  tell the computer what to accomplish and how to do. Many third generation languages also
                  use arithmetic operators such as * for multiplication and + for addition. Some early procedural
                  3GL are BASIC, PASCAL, C and FORTRAN. Some other advanced object-oriented 3GL are C++,
                  Java, and C#.
                  Fourth Generation Languages (4GL)


                  The fourth generation languages  also use English like statements. They specify what the
                  program should accomplish without explaining how. A 4GL is fast and requires less time and
                  effort on the part of the programmer. In fact, 4GLs are so easy to use and programmers with very
                  little programming background can develop programs. Examples of 4GL are SQL, Perl, Python
                  and Prolog etc.
                  Natural Languages (5GL)

                  The  fifth-generation  languages,  also known  as natural  languages  are  the  programming
                  languages that have visual tools to develop a program. Examples of fifth generation language
                  include Mercury and OPS5. Natural language is very easy to use. Natural languages are often
                  associated with expert system and artificial intelligence.



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