Python Functions
In this article, you will learn about activities; What is the meaning, words, categories, and activities. In addition, you will learn how to make Python.
Table of Contents
- What is a function in Python?
- Syntax of Function
- Example of a function
- How to call a function in python?
- Docstring
- The return statement
- Syntax of return
- Example of return
- How Function works in Python?
- Scope and Lifetime of variables
- Types of Functions
What is a function in Python?
Python, work is a group of private sector executives.
Help with exercise to break into smaller and similar programs. As our program has grown a lot, the job creates a more manageable system.
In addition, repairs are avoided and make them recyclable.
Syntax of Function:
def function_name(parameters):
"""docstring"""
statement(s)
The definition of the definition above is shown in the following sections.
1. The key word of the TKR is a sign of the beginning of a leader.
2. Name of activity to identify inappropriately. The name of the job is the same as Python's writings.
3. A guide (a reason) used for the cost of performance. They prefer.
4. Time (:) to show the end of the leader.
5. Good writing materials (message) to explain what works.
6. Python One or more relationships that relate to physical activity. The proof must contain the same level of bleeding (usually 4 places).
7. A clear choice to return to work value.
Example of a function:
def greet(name):
"""This function greets to
the person passed in as
parameter"""
print("Hello, " + name + ". Good morning!")
How to call a function in python?
When we have a specific task, we can call other programs or even call Python. To call the action you have to write the name of the job, according to the boundaries.
>>> greet('Paul')
Hello, Paul. Good morning!
Docstring:
The first presidential chain of chain of documents and chains of chains. It is used to describe a few words, what's working at the wedding.
While selecting, the documents are a good program. Apart from where to find it was the first night, always write your number.
In the first example, we have alerted the leader immediately. We often use three-digit documents that can be extended up to several lines. This cord is available to us as __doc__ the features of the job.
For example:
Try to keep the bottom of the waste, Python watching out.
>>> print(greet.__doc__)
This function greets to
the person passed into the
name parameter
The return statement:
After this, it is used to leave the work and return to the place known.
Syntax of return:
return [expression_list]
This text may include quantitative expressions and return values. If there are no details on the identification or proof it is not working, then the task will return to the item.
For example:
>>> print(greet("May"))
Hello, May. Good morning!
None
Example of return:
def absolute_value(num):
"""This function returns the absolute
value of the entered number"""
if num >= 0:
return num
else:
return -num
# Output: 2
print(absolute_value(2))
# Output: 4
print(absolute_value(-4))
How Function works in Python?
Scope and Lifetime of variables:
The size of a part of the program depends on the known changes. Articles and trends are defined in an unprecedented act. Therefore, they have a place to live.
A period of change in your life using a set of variables. Changing the life of the task during the operation is carried out.
When it is broken, let's go back to the action. Therefore, the action does not tell the cost of the old call.
Below is an example showing the effectiveness of the work.
def my_func():
x
= 10
print("Value
inside function:",x)
x = 20
my_func()
print("Value outside
function:",x)
Output:
Value inside function: 10
Value outside function: 20
Here, we can see that the value x is initially 20. Although mi_func () works x value of up to 10, it does not affect external activities.
This is due to a variable variable variable x (different performance) from outside. Although they have the same name, which is two different variables, with different methods.
On the other hand, external variables for the functions appear inside. They have an international level.
We can read about the value of this job, but we can not change it (in writing). To evaluate the value of non-functional values, it must be expressed as an international variable using the keyword.
Types of Functions:
Basically, we can divide up two types of the following activities:
1. Build up activities - jobs built for Python.
2. Operations defined in the user - activity defined in the user.
Comments
Post a Comment