Pascal Programming task 2 BTEC ND IT practitioners

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Joely Brice         Programming        9th January 2008

“Why are there so many different programming languages?”

A Procedural language specifies the actions of a program must obtain before its can fully function as desired. Cobol is an example of a procedural language. Procedural language had originally developed from the Assembly language designed in the 1950’s, since the start of computers, this is a low level language for programming and is no longer used. An assembly written language contains a series of instructions that corresponds to a number of executable commands, when it is translated by what is known as an ‘assembler’ it will then be loaded into the memory and then the commands executed.

After lower level procedural languages were first designed higher level programming languages was created, one of the most common being Pascal. Pascal, designed in 1970, is an important programming language as it uses structured programming; Pascal originally is solely a procedural based language although nowadays, Pascal now has various data structuring services. The original Pascal language was created to aid people with their learning of writing programs, now Pascal can still be used for educational purposes and software development.

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Another type of programming language, scripting, are programming languages that manage applications (programs designed to perform specific tasks). Unlike procedural language, scripts can run applications directly from what is called a source code, a form of human-readable instructions that consist of a program. The most popular scripting language available today is most probably JScript; JScript is mainly used for web page development and is structured like this:

 

 

<HTML>

<HEAD>

<TITLE>TEXT</TITLE>

</HEAD>

<BODY>

<SCRIPT LANGUAGE="JAVASCRIPT">

<!-- Hiding the code

document.write("TEXT!");

// done hiding -->

</SCRIPT>

</BODY>

</HTML>

JScript is used as a Windows Script engine. By this, it ...

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