RAPTOR

RAPTOR

1. Is a programing development environment based in flowcharts

   • It is designed for ease of use
   • Minimizes the amount of syntax you must learn in order to write correct instructions
   • It is a visual environment, so its easier to follow the flow of instruction execution
   • Its objective is to teach beginning programers how to design and execute algorithms
   • The error messages are designed to me faster understanded

2. Flowchart structure of algorithms

   • It means a set of connected symbols that represent actions to be performed
     • End
       • End of the algorithm
     • Start
       • Start of the algorithm
     • Input Statement
       • Allows to enter data and store it in a variable
     • Output Statement
       • Display the value of a variable
     • Assignment Statement
       • Change de value of the variable using matematicas operations
     • Procedure Call
       • Execute instructions defined in the named procedure

3. Variables

   • Are computer memory locations that hold data value
     • Automatically created when they are first used in a statement
     • Examples
       • X<---14
         • Assigns the data value 14 to variable X
       • X<---X+1
         • Retrieves the current value of X, 14, adds 1 to it, and puts the result, 15, in the variable X
       • X<---X*2
         • Retrieves the current value of X, 15, multiplies it by 2, and puts the result, 30, in the variable X
   • Their changing data values enable a program to act differently every time its executed
   • They should be given a meaningful and descriptive name by the programmer

4. Common errors and their causes

   • 1. "Variable X does not have a value"
     • The variable has not been given a value
     • The variable name was misspelled
   • 2. "Can`t assign string to numeric variable X" "Can`t assign numeric variable X"
     • Your statements attempt to change the data type of a variable

5. Comments

   • Are used to explain some aspect of a program to the person who is reading
     • Programmer Header
       • Documents who and when the program was written, and a general description of what it does
     • Section Description
       • Mark major sections of the program for easier understanding of its structure
     • Logic Description
       • Explain non-standard logic

6. Ana Maria Achury C. 9 D

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