Page 127 - Computer Science V2.0 Class 11

next150Rate ← 10
above250Rate ← 20
meterCharges ← 75

if unitsConsumed <= 100 then
first100Charge = unitsConsumed * first100Rate
next150Charge = 0
above250Charge = 0
else
first100Charge = 100 * first100Rate
if unitsConsumed <= 250 then
next150Charge = (unitsConsumed - 100) * next150Rate
above250charge = 0
else
next150Charge = 150 * next150Rate
above250Charge = (unitsConsumed - 250) * above250Rate

totalWaterBill first100Charge + next150Charge + above250Charge + meter_charges
12. What are conditionals? When they are required in a program?
Ans. In the field of computer science, conditionals are features of a programming language that carry out various computations or actions
depending on whether a boolean condition that is specified by the programmer evaluates to true or false. Conditionals are required in a
program when we need to calculate a result based on the condition(s) that have been specified.
13. Match the pairs

Flowchart Symbols Functions

Flow of Control

Process Step

Start/Stop of the Process

Data

Decision Making

Ans. Refer to 4.2.2 Computing Simple Interest, Flowchart
14. Following is an algorithm for going to school or college. Can you suggest improvements in this to include other options?
Reach_School_Algorithm
a. Wake up
b. Get ready
c. Take lunch box
d. Take bus
e. Get off the bus
f. Reach school or college
Ans. a. Wake up
b. Brush our teeth
c. Do some exercise
d. Take a bath
e. Get ready

Problem Solving 113