Computing glossery

Computing glossery

1. Data

   • has no meaning before the computer presses it to turn it in to something with a meaning which can be output to a user.

2. Process

   • giving data a context

3. Output

   • data that now means something

4. Constant

   • like a variable but it does not change
     • for example pi the number would be the literal
     • the name you have set it as would be the identifier

5. Variable

   • something that changes during a program for example the score of a game

6. Data types

   • the type of data, how it is stored and what it can be used for
     • Integer
       • 4 Byte
         • Integer data type can store any whole number, such as: -115, 0, 2, 341.
     • Real
       • 8 Byte
         • Real data types are used when there is a decimal point with a fractional number, such as: -32.15678, 0.012, 59.00564, 72.0
     • String
       • 1 Byte
         • String can be used to store an alphanumeric character, such as letter, digit, symbol, space or punctuation mark. It is normally used as an array so that: String could contain the message ‘Hello World!’
   • Character
     • 1 Byte
       • Character data type can store a single alphanumeric character, such as: digit, letter, symbol or any punctuation marks.
   • Boolean
     • 1 Byte
       • Boolean data types are used for logical operations and have the value True or False
   • information can’t be stored as an array if there are different data types
     • Array- one dimensional one dimensional is a linier list E.G first name last name, two dimensional a table

7. Array

   • one dimensional one dimensional is a linier list E.G first name last name, two dimensional a table

8. < Less than <= less than or equal to == equal to >= grater than or equal to > grater than != not equal to

9. AND FUNCTION

   • it is only true if all the inputs are the same
   • OR FUNCTION
     • Is true if either or both inputs are the same
   • Not function
     • on is of and off is on

10. Records are all the information about Fred along the column

11. A field id one set of date (a row)