Page 106 - Computer Science V2.0 Class 11

Variable: A variable is a name for a sequence of memory locations.

A flowchart is a pictorial representation of an algorithm. Some common symbols used in a flowchart are as
follows:

Symbol Name Symbol usage Description

Start/Stop Used to depict the start and stop of an algorithm

Process Used to depict some arithmetic operation

Input/Output Used to depict Read/Input and Write/Print

Arrow Used to connect shapes depicting the flow of control

Decision box Represents a condition that may yield True or False.

Table 4.1 Common Symbols used in a Flowchart

The above algorithm may be represented as the following flowchart (Fig 4.2):

Start

Input principal, rate, time

interest = principal × rate × time
100

Print interest

Stop

Fig 4.2: Flowchart for computing simple interest

Below, we show a translation of the above description of the computation of simple interest into Python:

principal = int(input('enter Principal amount: '))
rate = int(input('enter interest rate per annum: '))

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