Page 405 - Computer_Science_F5

Computer Science In this example, we have a class us to break down complex tasks into
named “MyClass” that is defined but smaller, reusable blocks of code.
does not have any members (attributes Modules are collections of functions and
or methods) defined yet. The “pass”
variables that can be imported and used
statement is used as a placeholder to
in other programs.
FOR ONLINE READING ONLY
indicate that the class definition is empty
for now. Meaning of function

A function denotes a labeled segment
In both cases, the “pass” statement serves
as a null operation that does nothing. of code designed to accomplish a
It is used when the syntax requires a specific task. It accepts inputs, termed
statement, but no specific action or parameters or arguments, and generates
implementation is needed at that point. outputs, referred to as return values.

Python functions and modules Function structure
Python functions and modules are Functions are declared using the “def”
powerful tools that help in organizing keyword, followed by the function name
and structuring code. Functions allow and parentheses.

Parameters, if present, are listed within the parentheses. The function’s body is
indented and encompasses the code executed upon function invocation. There is
advantages in using functions in Python. The following are advantages of function:
(a) Code reusability: Functions can be invoked multiple times, curtailing code
redundancy and fostering efficiency.
(b) Abstraction: Functions shield the implementation details, enabling users to
concentrate on functionality without requiring knowledge of internal workings.

The following are some examples of how to write functions:
(i) Basic Function:
def invite(name):
print(“Welcome, “ + name + “!”)

welcome(“Pepe Kale”) # Output: Welcome, Pepe Kale!

(ii) Function with return Value:

def cube(number):
return number * number*number
result = cube(3)
print(result) # Output: 9

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for Advanced Secondary Schools

Computer Science Form 5.indd 396 23/07/2024 12:34