Estimated time

15-30 minutes

Level of difficulty

Easy

Objectives

• creating classes, methods, and variables;
• calling methods;
• getting simple access to instance variables;

Scenario

• create a class representing a mobile phone;
• your class should implement the following methods:
• __init__ expects a number to be passed as an argument; this method stores the number in an instance variable self.number
• turn_on() should return the message 'mobile phone {number} is turned on'. Curly brackets are used to mark the place to insert the object's number variable;
• turn_off() should return the message 'mobile phone is turned off';
• call(number) should return the message 'calling {number}'. Curly brackets are used to mark the place to insert the object's number variable;
• create two objects representing two different mobile phones; assign any random phone numbers to them;
• implement a sequence of method calls on the objects to turn them on, call any number. Print the methods' outcomes;
• turn off both mobiles.

Example output

output