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Wednesday, 8 February 2012

HIGH-LEVEL LANGUAGES

The programming languages that are close to human language are called high-level languages. The instructions in these languages are more like human languages.
BASIC, FORTRAN, COBOL, PASCAL, C, etc. are examples of high-level language/ Unlike low-level languages, these languages are easier to learn. These languages are used for writing application programs. For example, a high-level language ma be used for writing a program for maintaining the budget of a company.

LOW LEVEL LANGUAGES


The computer language that is close to the machine language is called low-level language. There are two types of low-level language. These are machine language and assembly language.
Machine Language


The computer works with arrangements of Os and 'Is. The arrangement of Os and is is called the binary code. This is the fundamental language of the computer. Since the computer works only with Os and Is, the instructions have to be given to the computer in binary code. The instructions written in binary code are called the machine language.
The machine language is difficult to understand and learn. Every computer system has its own machine language. A program written on one type of computer system cannot run on another type of computer system.

Assembly Language 
Assembly language was developed to make the programming task easier. Instead of using the binary code, it uses symbols. The symbols are used to represent instructions. Therefore, it is also known as the symbolic language. Since the assembly language is close to the machine language, it is called the low-level language.
Writing a program in assembly language is easier than writing the program in machine language. However, the assembly language is also machine-specific. It is also hard to learn. Assembly language is usually used for writing system software and firmware.



What is a computer language?


Computer Language
The computer works by executing instructions. Each instruction directs one operation of the computer system. Several instructions are written to perform one task. This set of instructions given to the computer to perform a task is called the computer program.
The computer instructions are written in a specific manner and according to a set of rules. These rules are called the computer language.
Several languages have been developed for writing computer programs. These languages are divided into two main categories. These are:
1.          Low Level Languages
2.          High Level Languages