15 terms

A Level Computer Science - Number Systems

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Natural Number
the positive integers used for counting (whole numbers) 1, 2, 3, etc., and sometimes zero as well.
Real Number
The set of rational and irrational numbers. Any number that exists.
Ordinal Number
A whole number that names the position of an object in sequence ( first, second, third...)
Irrational Number
Any real number which cant be expressed as a fraction of two integers
Rational Number
A number that can be written as a fraction
ASCII
A standard encoding for storing text with one byte per character
Unicode
16-bit code that covers every character of the most common languages, plus several thousand symbols.
Ord()
The built in function that casts a character to its ASCII number format
Chr()
The built in function that casts a number to its ASCII character format
Extended ASCII
The character set that moved ASCII beyond a 7 bit representation to include more characters
Unicode
the character set most appropriate for this symbol
ASCII
the character set most appropriate for this symbol
Parity Bit
the 8th bit in an ASCII bit pattern represents
Even Parity
the parity of this bit pattern

1001010010
Odd Parity
the parity of this bit pattern

1101010010
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