Page 158 - Computer

Computer Science (vii) Include start and end points: Step 2: Define the processes or
Include a starting symbol (usually

actions, that is, adding or
an oval shape) to represent the
calculating the sum of the
beginning of the process and an
two numbers.
ending symbol (also an oval) to
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Step 3: Identify the output. Output
represent the conclusion of the
is the sum.
process.
(viii) Add connectors: Step 4: Identify the standard symbols
Employ link points (small circles) to used in the problem.
join different parts of the flowchart Step 5: Draw a flowchart, as shown
together, especially when the in Figure 8.5.
flowchart extends across multiple
pages. Start

Example 1

Write an algorithm for calculating the Input N1, N2
sum of any two numbers entered by the
user and then draw a flowchart for it.

Solution: SUM = N1 + N2
Algorithm for adding two numbers:
Step 1: Start by identifying two
numbers, e.g., N1 and N2. Output SUM
Step 2: Input or write the first number
N1.
Step 3: Input or write the second End/Stop
number N2.
Step 4: Add the number N1 and Figure 8.5: Flow chart for the sum of two
number N2, i.e., N1+N2. numbers

Step 5: Give the answer or output the
sum, i.e., Sum= N1 + N2. Example 2
Step 6: End the process. Suppose we want to write an algorithm

to find the square of a number and
The following are steps for drawing represent it using a flowchart.
the flowchart that will calculate the
sum of any two numbers: Before developing the algorithm, you
Step 1: Identify the inputs (two should first identify the input, process,
numbers, for example, N1 and output. In this case, input will be
and N2), the number whose square is required.

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