# DATA REPRESENTATION PDF

Data Representation in Computer Systems. Introduction Positional Numbering Systems Converting Between Bases Converting. Data Representation. ▫ Computers use digital representation. ▫ Based on a binary system. (uses on/off states to represent 2 digits). ▫ Many different types of . Internal Data Representation, Shimon Schocken, IDC Herzliya, reffirodonverm.ga2cs. com slide 2. Why binary representation makes sense? Inside computers, all data is. Author: MICKEY WEDEMEYER Language: English, Japanese, Portuguese Country: Haiti Genre: Environment Pages: 768 Published (Last): 19.11.2015 ISBN: 257-7-21059-273-5 ePub File Size: 28.45 MB PDF File Size: 11.58 MB Distribution: Free* [*Sign up for free] Downloads: 37294 Uploaded by: KALA Data refers to the symbols that represent people, events Data Representation refers to the form in which data is . Adobe Acrobat produces documents in PDF. Binary Data Representation and. Binary Arithmetic. Binary Data Representation. Important Number Systems for Computers. Number System. How the data is actually represented in the computer hardware. External representation. How we interpret or conceptualize the internal.

The following 8 bits represent exponent E. The remaining 23 bits represents fraction F. In this example, the actual fraction is 1. In normalized form, the actual exponent is E so-called excess or bias This is because we need to represent both positive and negative exponent.

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With an 8-bit E, ranging from 0 to , the excess scheme could provide actual exponent of to Hence, the number represented is De-Normalized Form Normalized form has a serious problem, with an implicit leading 1 for the fraction, it cannot represent the number zero! Convince yourself on this! De-normalized form was devised to represent zero and other numbers. An implicit leading 0 instead of 1 is used for the fraction; and the actual exponent is always The actual fraction is 0. Hence the number is These numbers are in the so-called normalized form. The sign-bit represents the sign of the number. Fractional part 1.

F are normalized with an implicit leading 1. The exponent is bias or in excess of , so as to represent both positive and negative exponent.

These numbers are in the so-called denormalized form. It can also represents very small positive and negative number close to zero. This is beyond the scope of this article.

Example 1: Suppose that IEEE bit floating-point representation pattern is 0 Compute the largest and smallest negative numbers can be represented in the bit normalized form.

Repeat 1 for the bit denormalized form. Repeat 2 for the bit denormalized form. For examples, System. The following 11 bits represent exponent E. The remaining 52 bits represents fraction F.

These are in the denormalized form. More on Floating-Point Representation There are three parts in the floating-point representation: The sign bit S is self-explanatory 0 for positive numbers and 1 for negative numbers.

## Data Representation in Computers.pdf

For the exponent E , a so-called bias or excess is applied so as to represent both positive and negative exponent. The bias is set at half of the range.

For single precision with an 8-bit exponent, the bias is or excess For double precision with a bit exponent, the bias is or excess The fraction F also called the mantissa or significand is composed of an implicit leading bit before the radix point and the fractional bits after the radix point. The leading bit for normalized numbers is 1; while the leading bit for denormalized numbers is 0.

## Common Data Representation

Download as PDF. A value of a fixed-point data type is essentially an integer, scaled by an implicit weighing factor depending upon its type. Signed Magnitude Form: In this form, the sign bit is considered explicitly. CASE 1: CASE 2: If there is carry out at MSB but not carry in. To represent the approximation of very small and very large real numbers, floating point representation is used.

There is always a trade-off between range and precision.

As numbers are represented in binary. If mantissa is then processor interprets it as 1. Take me to Testbook Practice.