Explain about Python function?

A starting point for any program is the key Python function feature. The python interpreter runs the code sequentially when the program is executed. The key python function is only executed when it is run as a program in Python. The key feature will not be executed if it is imported as a module.
What is the role of def main() in Python? Find the following to comprehend this.

What's a Python Function?

A feature in Python is used in more than one place in a program to use the code. It is also known as a system or operation. Python function offers you many built-in features, such as print(), but it also allows you the ability to build your features.
How a python function can be defined and named in Python
The Python function is defined by the "def " statement, followed by the name and parentheses of the function (())

EXAMPLE:

The print function func1() calls our def func1(): and prints the " I am learning Python function None." order.

In Python, there is a set of rules to define a function.

Inside these parentheses, any args or input parameters should be positioned
The first statement feature can be an optional statement-docstring or a function documentation string.

Inside each feature, the code begins with a colon (:) and should be indented (space)
The return (expression) statement exits a function, optionally passing a value back to the caller. A return statement without args is similar to the return None statement.

If you are interested To learn Python you can enroll for free live demo Python Online course

Indentation (Space) Significance in Python function

We must understand the indentation rule for declaring Python functions before we get acquainted with Python functions. And these rules apply to other Python elements as well as to declaring conditions, loops, or variables.

To define the code, Python follows a strict indentation style, because Python functions have no clear start or end, such as curly braces, to signify the start and stop for the method, they have to depend on this indentation. Here we take the "print" command for a simple example. If we write the "print" function right below the def function 1(): it will display an "indentation error: expected an indented block".
Now, when the indent (space) is inserted in front of the print feature, it should be printed as planned.

At least one indent is necessary to make your code function effectively. But it is advisable to leave approximately 3-4 indents as a best practice to name your work.
It is also important for the rest of your code to retain the same indentation when declaring indentation. For example, when we call another statement "still in func1" in the below screenshot and when it is not declared right below the first print statement, an indentation error.

Now, when we apply the same indentation to both statements and align them in the same row, the expected output is given.

How does the return value function?

The return command in Python defines the value to be returned to the function's caller.
In the following case, let's understand this with the python function.

Phase 1)

Here - we see when "return" is not a function. For example, we want a square of 4, and when the code is executed, it should answer '16'. Which it gives when we simply use "print x*x" code, but it gives "print square" as an output when you call the "None" function. This is because recursion does not occur when you call the function and drops off the end of the function. Python returns "None" when the end of the function fails.

Step 2)

We substitute the print command with the assignment command to make it simpler. Let's have the production reviewed.
When you run the "print square (4)" command, it simply returns the value of the object because it returns "None". After all, we don't have any particular function to run over here.

Step 3)

Now, here we will see how to use the "return" command to retrieve the output. If you use the "return" function and execute the code, the output will be "16."

Phase 4)

Python function(s) are an entity in themselves, and an object has some meaning. Here, we can see how an object is handled by Python Training. When you run the 'print square' button, it returns the value of the piece. Since we have not passed any argument, we have no special function to run over here, returning a default value (0x021B2D30) that is the object's location. You probably won't ever need to do this in a functional Python program.

Arguments in Function

The argument is a value that, when it is called, is passed to the function.
In other words, on the calling side, it is an argument and it is a parameter on the function side.
Let's see how it operates with Python Args -
Phase 1)
In the function specification, arguments are declared. You can transfer the values for the args as shown below when calling the method.
Phase 2)
Assign a value to the python function description to declare the default value of a statement.

Example:

No default values are available for x. Values default to y=0.0. Python assigns the supplied value to x when we supply just one argument when calling the multiply function while retaining the value of y=0.0. Consequently, the multiplication of x*y=0
Step 3)
This time, instead of the default value y=0, we change the value to y=2 and it returns the output as (4x2)=8.
Step 4)
In Python, you can also adjust the order in which you can move the arguments. We have reversed the order of the x and y values here to x=4 and y=2.
Phase 5)
It is also possible to transfer several arguments as an array. We call the multiple args (1,2,3,4,5) in this example by calling the args) function.

Example:

When we call the (*args) function, we declared multiple args as number (1,2,3,4,5); it prints output as (1,2,3,4,5)

The Tips:

In 2.7 Python. In Python, feature overloading is not supported. Function Overloading is the ability of a different implementation to construct several methods of the same name. Action Overloading in Python 3 is fully supported
There is quite a misunderstanding about techniques and functions. Methods are correlated with object instances in Python course, while functions are not. When a method is called by Python, it connects the first parameter of that call to the corresponding object reference. In simple words, a standalone function is a "function" in Python, while a "method" is a function that is an attribute of a class or an instance.

Here is the full code for Python 3.

#Define A Function
Func1() def:
Print a Print ("still in func1")
Func1 Feature ()
Square(x) def:
Return x*x, return x*x
Druck(square(4))
Multiply def (x, y = 0):
print("value of x=",x)
print("value of y=",y)
Return x*y*yy
Printing(multiply(y=2,x=4))
Here is the full code for Python 2.
#Define A Function
Func1() def:
Print " I am learning Python function"
Print " still in func1"
Func1 Feature ()
Square(x) def:
Return x*x, return x*x
Square Printing (4)
Multiply def (x, y = 0):
Print"value of x=",x,x
Value of y="value of y=" print,yy
Return x*y*yy*
Multiply to print(y=2,x=4)

Conclusion

I hope you conclude functions in Python. You can learn more about Python function (s) in a practical way through Python online training.