How do you Define a Function in Python?

It is pretty simple to define a function in Python. The following points need to be kept in mind while defining a Python function:

Keyword “def”: In Python, you need to use the keyword “def” to specify the function.
Function name followed by parenthesis “()”: After the keyword “def”, you need to write the name of the function. The naming convention rules for naming it are the same as rules for Python identifiers. A good practice is to name the function keeping in mind the task it is supposed to do.
Input parameters: The arguments or the input parameters have to be mentioned within the parenthesis following the function name.
A colon after the parenthesis: A colon will be following the parenthesis where arguments are entered. It marks the end of the function header. The colon precedes the code block and is indented.
Docstring: It is an optional section that documents what the role of the function is. It enhances readability if a user looks at his code after a long duration.
Function Body: It comprises one or more Python statements. Essentially, these are valid statements that have the same indentation.
Return statement: It is an optional statement. The return keyword can be used by the Python function to return a value.

Sample syntax of a Python function–

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def understand_func(name):

    """

    The docstring section can tell information about the function.

    """

    print("Hello, " + name + ". Hope you are doing fine!")