Data,information Data and Information 4 Data –Raw, unorganised facts –Ideas or concepts 4...
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Transcript of Data,information Data and Information 4 Data –Raw, unorganised facts –Ideas or concepts 4...
data,information
Data and Information Data
– Raw, unorganised facts– Ideas or concepts
Information– When data is manipulated into a meaningful
form– Used to assist in decision making– Information presented in two forms
• Hard copy or soft copy
data,information
Data and Information Information, contd Digital information output not designed to be
printed, thus format & presentation are different Digital information formatted so best viewed on
screen Also can produce information not suited to hard
copy, eg. digital files, DVDs, etc. Output, end production of a solution Solution, a method of solving a problem
data,information
Purposes of Information
Inform– Convey facts, like reporting on issue
Persuade– Influence a decision or change a point of view
Entertain– Engage in a activity in a pleasing or amusing way
Educate– Provide knowledge & skills to use that knowledge
data,information
Types of data Integer data types
– A finite subset of numbers without a fractional or decimal component; used to represent whole numbers
Floating point numbers– Too small or big to be given as integers– Represented as decimal numbers
Character data types– Includes alphanumerical text, eg. letters, nos., spaces, symbols– Character variable holds a single letter, no. or symbol– Used in character fields not used in mathematical calculations,
such as names, telephone nos. , postcodes
data,information
Types of data String data types
– A series of symbols or values, such as a character string (a sequence of characters) or a binary string (a sequence of binary values;
– phone nos. postcodes, are strings that include numbers. – String data types require less memory.