Transcript Creating Flowcharts

Creating Flowcharts
Definition
A flowchart is a schematic representation
of an algorithm or a process.
Parts of a Flowchart
Start/end
Input/output
Process
Arrows
Decision
Display
Start/End
• Shape is a rounded rectangle
• Start is required of all flow charts
• Some flow charts may not have an END
Process
• Shape is rectangular
• Process involves the action or the “verb”
part of the flowchart
• Examples include
– Add 1
– Turn the motor on
– Turn the light off
– Rotate the part
Input/Output
• Shape is a parallelogram
• Indicates that manual operation is needed
• Examples include
– Type in the weight
– Check the balance
– Time the operation
Decision
• Shape is a rhombus
• Outcome is either yes or no
• Examples include
– Is this number larger than
10?
– Does the weight meet
specifications?
– Has the count been
reached?
Arrows
• Arrows indicate the flow of the chart.
• Arrows are drawn from the output of one
block to the input of another.
• Only one arrow can represent outputs.
• Multiple arrows may represent inputs.
Example
• Count from 1 to 9 by odd numbers.
• Before attempting to draw the flowchart,
determine what you want the output to be.
• What is the first block (always)?
Step 1
• The output will be 1, 3, 5, 7, 9.
• The Start block is always first.
START
Step 2
The program begins with the number 1.
START
INPUT 1
Step 4
Now that there is a number, the program
will state the number.
START
INPUT 1
SAY NUMBER
Step 3
The number 2 will be added to 1 so that
the program will continue to count by odd
numbers.
START
INPUT 1
SAY NUMBER
ADD 2
Step 4
START
INPUT 1
Add a decision block so
that the program will
continue counting until
the value is greater than
9.
SAY NUMBER
ADD 2
Is number >9?
NO
Step 5
START
INPUT 1
SAY NUMBER
Once the number is
greater than 9, the
program ends.
ADD 2
Is number >9?
YES
END
NO
Your Turn
Create a flow chart that shows how to pour
a glass of milk.