Introduction to Flowchart

Graphical representation of a problem�s
solution is called flow chart. It is easy to understand a graphical
representation then a written solution. Floe chart provides quick over
view of a problem�s solution. It is just alike the map of a project.
Engineers feel easy to complete a project according the given map same
as a programmer feel easy to write down code of a problem according to
the flow chat of that problem. Flow chart helps programmer to determine
logical errors in the solution.

Symbols of Flowchart

As you see a building�s map you will
notice there are some standard symbols to represent things such as
doors, stairs, walls etc. same as there are some standard symbols to
represent things in flowchart. Commonly used flowchart�s symbols are
given below.

Flow Lines

A line with arrow head is used to show the data flow in a flowchart.

Start / End

Ellipse type oval shape is used to represent start and end of an algorithm.

sart and end

Input / Output

Parallelogram is used to represent input and output of an algorithm.

Processing

Rectangular shape is used to represent processing step in algorithm.

Selection

Diamond shape is used to represent
decision in flowchart. It takes one input and condition inside that
shape and shows two output directions. If condition is true one side
step executed other wise other. For example, we want to get greater
number in two numbers we will draw in this way:

selection

Connector

A connector symbol is represented by a
small circle. It is used to join various pats of flowchart. A number is
written inside the circle to identify the position where the connector
joins or leave the flowchart.

Off-page/ On-page Connector

Pentagon is used to represent off-page
on-page connector. This symbol is used for lengthy flow charts
that doesn�t fit on one page. This shows continuity of flow chart to
next page.

Pre-defined Process

This symbol is used to indicate a function or sub part of the program.

Remarks

This symbol is used to show remarks or comments in flowchart.

Advantages of Flowchart

Flowcharts help us to understand the logic and purpose of algorithm more efficiently.
It guides programmer during coding of programme.
It helps to check logical errors in algorithm.

Limitation of Flowchart

Draw a flowchart of a complex problem is more difficult task.
If there is slight or major change in requirements the whole flowchart will redraw.

Read Count: 8 times

Comments

No comments yet.