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WRITING AN ALGORITHM

Algorithm provides a step-by-step solution to the problem. Let’s write an algorithm for
some problems.
MAKING A CUP OF TEA CALCULATE THE SUM OF TWO

Step 1 Start. NUMBERS
Step 2 Collect Kettle, Teabags, water, Step 1 Start.
milk, sugar and cup. Step 2 Read two numbers and store

Step 3 Boil the water in the kettle. them in A and B.
Step 4 Pour the boiling water into the cup. Step 3 Add two numbers A and B.

Step 5 Add milk, sugar and put a teabag Step 4 Print the sum.
in the cup.
Step 5 Stop.
Step 6 Stir the tea and the tea is ready.
Step 7 Stop.

CALCULATING THE AREA OF A CIRCLE

Step 1 Start.

Step 2 Read the radius of the circle and store it in r. (where, r is the length from the
centre of the circle to the edge of the circle.)

2
Step 3 Calculate the area of the circle. (Where, Area = π × r (3.14 × radius × radius))
Step 4 Print the area.

Step 5 Stop.

FLOWCHART

A flowchart is the graphical representation of a process and the logic (also referred to
as an algorithm) used in it. Flowcharts are used in analysing, designing, documenting or
managing a process or program in various fields.

SYMBOLS USED IN FLOWCHARTS

A flowchart uses specific geometrical shapes and directional arrows to draw a flow chart
for a particular task. A set of geometrical shapes represents the steps involved in the
solution process. Each shape represents a specific function, activity, or process. Directional

arrows are used to connect the shapes, indicating the flow of the solution.

84 Computer Science (V5.0)-V