PRESENTATIOPRESENTATION ON N ON

FLOWCHARTSFLOWCHARTS

PRESENTATIOPRESENTATION ON N ON

FLOWCHARTSFLOWCHARTSMade by:Made by:

Simranjit SinghSimranjit Singh

CSE-2CSE-2ndnd Shift Shift

115360115360

FLOW CHART• An flow chart is a type of diagram

that represents an algorithm or process, showing the steps as boxes of various kinds and their order by connecting these with arrows.

USES….• Flow chart are used in designing

and documenting complex processes.

• Like other types of diagrams, they help to visualize what is going on and thereby help the viewer to understand the process.

TYPES…• Document flowcharts, showing

control over a document-flow over a system.

• Data flowcharts, showing control over a data-flow in a system.

• System flowcharts showing control at a physical or resource level.

• Program flowchart, showing the controls in a program within a system.

Flowchart Symbols…

Oval

Parallelogram

Rectangle

Diamond

Hybrid

Name Symbol Use in Flowchart

Denotes the beginning or end of the program

Denotes an input operation

Denotes an output operation

Denotes a decision (or branch) to be made. The program should continue along one of two routes. (e.g. IF/THEN/ELSE)

Denotes a process to be carried oute.g. addition, subtraction, division etc.

Flow line Denotes the direction of logic flow in the program

SYMBOLS• TERMINATOR: An oval flowchart shape indicating

the start or end of the process.• PROCESS: An rectangular flowchart shape

indicating a normal process flow step.• DECISION: A diamond flow chart shape indication

a branch in the process flow.• CONNECTOR: A small, labeled circular flow chart

shape used to indicate a jump in the process flow.• DATA: A parallelogram that indicates data input or

output ( I/O) for the process.• DOCUMENT: Used to indicate a document or

report.

DATA FLOW EXTENSIONS…

• A document represented as a rectangle with a wavy base.

• A manual input represented by a quadrilateral.

• A data file represented by a cylinder.

• A manual operation represented by a trapezoid.

ADVANTAGES…• COMMUNICATION.

• EFFECTIVE ANALYSIS.

• PROPER DOCUMENTATION.

• EFFICIENT CODING.

• PROPER DEBUGGING.

LIMITATIONS…• COMPLEX LOGIC.

• ALTERATIONS AND MODIFICATIONS.

• THE ESSENTIALS OF WHAT IS DONE CAN EASILY BE LOST IN THE TECHNICAL DETAILS OF HOW IT IS DONE.

LAMP FLOWCHART…

A flowchart representing for

computing factorial…

Flow chart showing driving to a goal…

Flow chart for finding out the

largest of 3 numbers…

Flowchart to find the sum of first 50

natural numbers…

Example…

PRINT“PASS”

Step 1: Input M1,M2,M3,M4Step 2: GRADE (M1+M2+M3+M4)/4 Step 3: if (GRADE <50) then

Print “FAIL” else

Print “PASS” endif

START

InputM1,M2,M3,M4

GRADE(M1+M2+M3+M4)/4

ISGRADE<50

PRINT“FAIL”

STOP

YN

EXAMPLE…

EXAMPLE…

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