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# Computer Codes - Computer Fundamentals Notes | EduRev

## : Computer Codes - Computer Fundamentals Notes | EduRev

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Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 1/30 Chapter 4: Computer Codes
Ref. Page
Page 2

Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 1/30 Chapter 4: Computer Codes
Ref. Page
Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 2/30 Chapter 4: Computer Codes
Ref. Page
In this chapter you will learn about:
§ Computer data
§ Computer codes: representation of data in binary
§ Most commonly used computer codes
§ Collating sequence
Learning Objectives
Learning Objectives
36
Page 3

Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 1/30 Chapter 4: Computer Codes
Ref. Page
Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 2/30 Chapter 4: Computer Codes
Ref. Page
In this chapter you will learn about:
§ Computer data
§ Computer codes: representation of data in binary
§ Most commonly used computer codes
§ Collating sequence
Learning Objectives
Learning Objectives
36
Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 3/30 Chapter 4: Computer Codes
Ref. Page
§ Numeric Data consists of only numbers 0, 1, 2, …, 9
§ Alphabetic Data consists of only the letters A, B, C,
…, Z, in both uppercase and lowercase, and blank
character
§ Alphanumeric Data is a string of symbols where a
symbol may be one of the letters A, B, C, …, Z, in
either uppercase or lowercase, or one of the digits 0,
1, 2, …, 9, or a special character, such as + - * / ,  . (
) = etc.
Data Types
Data Types
36
Page 4

Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 1/30 Chapter 4: Computer Codes
Ref. Page
Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 2/30 Chapter 4: Computer Codes
Ref. Page
In this chapter you will learn about:
§ Computer data
§ Computer codes: representation of data in binary
§ Most commonly used computer codes
§ Collating sequence
Learning Objectives
Learning Objectives
36
Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 3/30 Chapter 4: Computer Codes
Ref. Page
§ Numeric Data consists of only numbers 0, 1, 2, …, 9
§ Alphabetic Data consists of only the letters A, B, C,
…, Z, in both uppercase and lowercase, and blank
character
§ Alphanumeric Data is a string of symbols where a
symbol may be one of the letters A, B, C, …, Z, in
either uppercase or lowercase, or one of the digits 0,
1, 2, …, 9, or a special character, such as + - * / ,  . (
) = etc.
Data Types
Data Types
36
Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 4/30 Chapter 4: Computer Codes
Ref. Page
§ Computer codes are used for internal representation of
data in computers
§ As computers use binary numbers for internal data
representation, computer codes use binary coding
schemes
§ In binary coding, every symbol that appears in the data
is represented by a group of bits
§ The group of bits used to represent a symbol is called a
byte
Computer Codes
Computer Codes
(Continued on next slide)
36
Page 5

Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 1/30 Chapter 4: Computer Codes
Ref. Page
Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 2/30 Chapter 4: Computer Codes
Ref. Page
In this chapter you will learn about:
§ Computer data
§ Computer codes: representation of data in binary
§ Most commonly used computer codes
§ Collating sequence
Learning Objectives
Learning Objectives
36
Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 3/30 Chapter 4: Computer Codes
Ref. Page
§ Numeric Data consists of only numbers 0, 1, 2, …, 9
§ Alphabetic Data consists of only the letters A, B, C,
…, Z, in both uppercase and lowercase, and blank
character
§ Alphanumeric Data is a string of symbols where a
symbol may be one of the letters A, B, C, …, Z, in
either uppercase or lowercase, or one of the digits 0,
1, 2, …, 9, or a special character, such as + - * / ,  . (
) = etc.
Data Types
Data Types
36
Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 4/30 Chapter 4: Computer Codes
Ref. Page
§ Computer codes are used for internal representation of
data in computers
§ As computers use binary numbers for internal data
representation, computer codes use binary coding
schemes
§ In binary coding, every symbol that appears in the data
is represented by a group of bits
§ The group of bits used to represent a symbol is called a
byte
Computer Codes
Computer Codes
(Continued on next slide)
36
Computer Fundamentals: Pradeep K. Sinha & Priti Sinha Computer Fundamentals: Pradeep K. Sinha & Priti Sinha
Slide 5/30 Chapter 4: Computer Codes
Ref. Page
§ As most modern coding schemes use 8 bits to represent
a symbol, the term byte is often used to mean a group
of 8 bits
§ Commonly used computer codes are BCD, EBCDIC, and
ASCII
Computer Codes
Computer Codes
(Continued from previous slide..)
36
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