Functions are one of the basic programming constructs in Python. They are used to group code for reuse and to achieve modular and readable programming. In this post, we will discuss how to create and use custom functions in Python, as well as how to pass arguments to them and set default values for those arguments.

Creating custom functions: To create a custom function in Python, we use the def keyword followed by a sequence of statements. For example:

def function_name():
    statement1
    statement2
    ...

We can also pass arguments to the function by adding them in parentheses after the function name. For example:

def function_name(arg1, arg2):
    statement1
    statement2
    ...

To use the created function, we simply call it by its name and pass the appropriate arguments. For example:

function_name(arg1_value, arg2_value)

Arguments and default values: If we want our function to accept arguments, we can pass them to it during its definition. For example:

Copy codedef function_name(arg1, arg2):
    statement1
    statement2
    ...

To set a default value for an argument, we simply assign it to the argument in the function definition. For example:

Copy codedef function_name(arg1, arg2=default_value):
    statement1
    statement2
    ...

Built-in functions in Python: Python has many built-in functions that we can use in our code. For example:

• abs() – returns the absolute value of a number
• len() – returns the length (number of elements) of a given sequence (e.g. list, string)
• max() – returns the maximum value from a given sequence
• min() – returns the minimum value from a given sequence

In addition to built-in functions, we can also import additional functions from various Python libraries and modules.

Text generated using chat.openai.com.