P1. Explain using examples how numeric and alphanumeric data can be coded within a computer system
What is numeric data?
Numerical data is information which something that is measurable. Numerical data is collected in numbers form, even though there are other types of data that can appear in like number form. An example of numerical data would be the number of students that have attended class over a course of a month.
What is alphanumeric data?
Alphanumeric data has a combination of numbers, letters and symbols. An example of this would be a postcode e.g. SW1 3AF or even a car registration number. Alphanumeric data is not necessary have to contain a combination of numbers and letters it can just be simply as a text example a name of a person ‘Mohamud Abukar ‘
A character encoding tells the computer how to interpret raw zeroes and ones into real characters. It usually does this by pairing numbers with characters. Words and sentences in text are created from characters and these characters are grouped into a character set. There are many different types of character encodings floating around at present, but the ones we deal most frequently with are ASCII, 8-bit encodings, and Unicode-based encodings.
A character encoding the computer interpret zeroes and ones into real characters. This method is done by pairing numbers with characters. Words and sentence in text are made from characters and these characters and joined in to a character set. The most common type of character encoding is ASCII that uses 8-bit encodings and Unicode. The ASCII code represents English characters as numbers and each letter assigned number from 0 to 127
The Unicode is a standard that defines the internet text coding system in computers. Unicode supports characters for almost all modern languages.
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