FLOWCHARTING AND ALGORITHMS - Joannacel A. Paraiso

This week I learned about the:

FLOWCHARTING AND ALGORITHMS

Flowcharting
- is a two – dimensional representation of an algorithm. A diagram representing the logical sequence in which a combination of steps is to be performed.
- A common method of defining the logical steps of flow within a program by using a series of symbols to identify the basic input, process and output function within a program.


Algorithm
-is a finite set of instruction that specify a sequence of operations to be carried out in order to solve a specific problem or class of problems.

Basic symbols used in flowcharting:

• Terminal- it is used to signify the beginning and the end.
• Preparation/ initialization- signifies the preparation of data. used to select initial conditions. Used to represent instructions or groups of instructions that will alter or modify a program's course of execution.
• Input/Output- shows input and output. data are to be read inro the omputer's memory from an input device or data are to be passed fom the memory to an output device.
• Processing- performs any calculations that are to be done.
• Decision- signifies any decisions to be done.
• On – page Connector- Shows the entry or exit point of the flowchart. A non – processing symbol used to connect one part of the flowchart to another without drawing flow lines.
• Off – page Connector- Designated entry to or exit from one page when a flowchart requires more than one page.
• Flow lines- Signifies the process that is to be executed next.

Basic Control Strutures

• Sequence

-a process executed from one to another in a straightforward manner.

• Selection

-a choice is provided between alternatives.

• Repetition

-provides for the rpetitive exection of an operation or routine while the conditio is true.

Commonly Used Operators in Flowcharting

Arithmetic operators

• + addition
• - subtraction
• * multiplication
• / division