This PowerPoint helps students to consider the concept of infinity.
Data storage & representation
1. Data Storage & Representation How data is stored in the Computer
2. Data As you may recall data is raw facts that cannot take the form of letters, numbers, text , sound and images. There are two types of data Discrete Data DATA Continuous Data
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6. DECIMAL NUMBER SYSTEM Before we explain the concept of the binary system, let us review the number system we are familiar with. Our decimal number system consists of ten digits: 0,1,2,3,4,5,6,7,8,9 and for this reason it is referred to as the base 10 number system or denary. The base of any number may be indicated as a subscript on the extreme right of the number e.g.45510
7. Types of numbers in the denary system Natural numbers or whole numbers such as -1,2,3,10,108 etc. Integers are numbers that have no fractional parts and are either positive or negative. -19,88,-9etc. Real numbers are numbers with a decimal point or include a fractional part. 10.8, -8.9 etc The magnitude of a number refers to how large a number is. It does not depend on the sign of a number. E.gthe magnitude of -10 and 10 is 10.
8. Binary Addition To Lean 5 binary sums Octal number system Hexadecimal number system Binary subtraction
9. Representing Signed Numbers Signed numbers are both positive and negative integers. (an integer is a whole number with no fractional part) Ways of representing signed numbers are Sign and magnitude One’s complement Two’s complement Binary coded decimal
10. Sign & Magnitude representation The leftmost bit is used to represent the sign (positive or negative) and the remaining bits represent the magnitude. A ‘0’ sign bit indicates that the number is positive. A ‘1’ sign bit indicates that the number is negative. 00101101 Sign bit magnitude
11. 4 bit binary representation of the decimal system The range of numbers that can be represented using four bits is -7 to +7
