Essay Color Key

Free Essays
Unrated Essays
Better Essays
Stronger Essays
Powerful Essays
Term Papers
Research Papers




Comparison of Features Used in Programs

Rate This Paper:

Length: 758 words (2.2 double-spaced pages)
Rating: Red (FREE)      
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Comparison of Features Used in Programs

In Visual Basic variables are declared using Dim and then the name of
the variable, which could be anything of your choice. Dim is short for
DIMENSION. A Dim statement tells the computer to set up a place in the
memory with the right dimensions to store a piece of data that has a
certain data type. For example:

Dim k As Integer

Dim k As Integer sets up a place (location in memory) with the name k
and enough space to hold a whole number. “k” is a variable because the
values that this location have can vary. As well as setting up the
right size of space for a variable, a Dim statement sets up all the
things that can be done with the variable according to its data type.
In this case Dim statement sets up all the things that can be done
with a whole numbers.

In Pascal the variables are declared using VAR instead of using Dim.
The following is an example in Pascal of how a variable is declared:

VAR RANKS:ARRAY [0..51] OF INTEGER;

SUITS:ARRAY [0..51] OF CHAR;

I:INTEGER;

In JavaScript the Variable are also declared in a similar way to
Pascal for example:

Var day=mydate.getDay();

This is the declaring of the variables, you can also assign values to
the variables.



Data Types: is a formal description of the kind of data being stored
or manipulated within a program or system, for example alphabetic
data, numeric data or logical data some of the more important one are
listed below.
=====================================================================

Number (integer): is any whole number, whether positive or negative.
In visual basic you can declare the number as an integer, for example:

Dim bookingNo As Integer

and this is the same in Pascal, for example

VAR I, J: INTEGER;

Number (real): is any number represented with a fractional part. In
most high-level languages, real indicates that floating-point
representation is to be used when the number is stored or manipulated.
This implies that the number may contain a fractional part and that it
is processed to a limited number of significant figures.

This is used the same way in nearly all languages and doesn’t need to
be declared like an integer.

Character: These are also used the same way in nearly all the
languages and are set of symbols that may be represented by a computer
at a particular time. These symbols are called characters and can be
letters, digits, spaces, and punctuation marks and include
non-printing, control characters.

Boolean: can only have one of two values, true or false. This makes it
easy to use the values of Boolean variables to control the flow of the
program.

Pointers: is the address or reference of a data element, which allows
it to be retrieved without further searching. Pointers allow fast
access to data because little searching is required. When used on the
data stored in the computer’s memory the pointer is usually the
address of the data in the memory. However in a database system the
pointer may be the primary key or the reference number of the related
record.

These are basically used to point towards a particular place, for
example:

Set rng= AciveSheet.Rows (1)

This basically point towards the first row of the active sheet.



Data Structures: is a group of related data items organised in a
computer. A data structure allows a large number of pieces of data to
be managed as a single set. Each type of data structure makes it easy
for the programmer to find and process the data in particular ways.
Each type of structure has its own strengths and weaknesses. Examples
of data structures are arrays, lists, tables, trees, strings and
files.
=====================================================================


String: is textual data in the form of a list of characters, for
example words and punctuation. String data is made up of characters
data and will usually vary in length.

String is basically a variable containing text for example:

Var dayarray=new

Array(“Sunday”,“Monday”,“Tuesday”,“Wednesday”,“Thursday”,“Friday”,“Saturday”)

The Var dayarray=new is basically a string containing text which has
been declared after that. This could be used later on in the program.

Array: is set of data items of the same type grouped together using a
single identifier. Each of the data items is addressed by the variable
name and a subscript.

An example of this is:

Dim cell (1 To 10000) As Range

Dim I As Integer

For I = 1 To 10

This example of array is basically a variable which is a collection of
variable that use the same name, but are distinguished by the index
value.

In Pascal it would be written differently for example:

VAR RANKS:ARRAY [0..51] OF INTEGER;

SUITS:ARRAY [0..51] OF CHAR;

I:INTEGER;

This basically define the variables to store 52 integers. As you can
see that they are declared differently in both of the programs

Record: is a basic unit of data stored in a datafile. It is a
collection of items, which may be of different data types, all
relating to the individual or object the record describes and is
treated as a unit for processing. Most datafiles contain records,
which have the same types of information but about different
individuals or objects.

File: is a collection of related data. It is traditional to think of
files as being structured as a collection of identically structured
records mad up of fields

Concatenation: this mainly used to join things up



Program Routines
================

These are part of the program to do a specific task. It may be a
section of the main program or might be formalised as a procedure,
function or subroutine.

How to Cite this Page

MLA Citation:
"Comparison of Features Used in Programs." 123HelpMe.com. 20 Dec 2014
    <http://www.123HelpMe.com/view.asp?id=149372>.


Related Searches





Important Note: If you'd like to save a copy of the paper on your computer, you can COPY and PASTE it into your word processor. Please, follow these steps to do that in Windows:

1. Select the text of the paper with the mouse and press Ctrl+C.
2. Open your word processor and press Ctrl+V.

Company's Liability

123HelpMe.com (the "Web Site") is produced by the "Company". The contents of this Web Site, such as text, graphics, images, audio, video and all other material ("Material"), are protected by copyright under both United States and foreign laws. The Company makes no representations about the accuracy, reliability, completeness, or timeliness of the Material or about the results to be obtained from using the Material. You expressly agree that any use of the Material is entirely at your own risk. Most of the Material on the Web Site is provided and maintained by third parties. This third party Material may not be screened by the Company prior to its inclusion on the Web Site. You expressly agree that the Company is not liable or responsible for any defamatory, offensive, or illegal conduct of other subscribers or third parties.

The Materials are provided on an as-is basis without warranty express or implied. The Company and its suppliers and affiliates disclaim all warranties, including the warranty of non-infringement of proprietary or third party rights, and the warranty of fitness for a particular purpose. The Company and its suppliers make no warranties as to the accuracy, reliability, completeness, or timeliness of the material, services, text, graphics and links.

For a complete statement of the Terms of Service, please see our website. By obtaining these materials you agree to abide by the terms herein, by our Terms of Service as posted on the website and any and all alterations, revisions and amendments thereto.



Return to 123HelpMe.com

Copyright © 2000-2014 123HelpMe.com. All rights reserved. Terms of Service