I started learning python and I am wondering why empty function are needed in a programming language

e.g. in python:

def empty_func():
    pass

even in shell scripts empty function empty functions are available.

My Understandings and question:

1. Why do programming language needed empty functions? Is it for just playing around with programming language or nothing else that really matters?

2. If this has a purpose, can anyone describe the use case or give a real example of the usage of empty functions?

3. Or is there any tradition of programming languages allowing empty functions?

• For Sketching Algorithms or with Abstract Functions
• For Submitting forms with no action needs to be performed
• Placeholder for some mandatory operations

I started learning Python and I am wondering why empty function are needed in a programming language.

e.g. in python:

def empty_func():
    pass

Even in shell scripts empty functions are available.

My Understandings and question:

1. Why do programming languages need empty functions? Is it for just playing around with programming language or nothing else that really matters?

2. If this has a purpose, can anyone describe the use case or give a real example of the usage of empty functions?

3. Or is there any tradition of programming languages allowing empty functions?

EDIT (Things I got from reading your answers):

• For Sketching Algorithms or with Abstract Functions
• For Submitting forms with no action needs to be performed
• Placeholder for some mandatory operations

I started learning python and I am wondering why empty function are needed in a programming language

e.g. in python:

def empty_func():
    pass

even in shell scripts empty function empty functions are available.

My Understandings and question:

1. Why do programming language needed empty functions? Is it for just playing around with programming language or nothing else that really matters?

2. If this has a purpose, can anyone describe the use case or give a real example of the usage of empty functions?

3. Or is there any tradition of programming languages allowing empty functions?

• For Sketching Algorithms or with Abstract Functions
• For Submitting forms with no action needs to be performed
• Placeholder for some mandatory operations

I started learning python and I am wondering why empty function are needed in a programming language

e.g. in python:

def empty_func():
    pass

even in shell scripts empty function empty functions are available.

My Understandings and question:

1. Why do programming language needed empty functions? Is it for just playing around with programming language or nothing else that really matters?

2. If this has a purpose, can anyone describe the use case or give a real example of the usage of empty functions?

3. Or is there any tradition of programming languages allowing empty functions?

• For Sketching Algorithms or with Abstract Functions
• For Submitting forms with no action needs to be performed
• Placeholder for some mandatory operations

I started learning python and I am wondering why empty function are needed in a programming language

e.g. in python:

def empty_func():
    pass

even in shell scripts empty function empty functions are available.

My Understandings and question:

1. Why do programming language needed empty functions? Is it for just playing around with programming language or nothing else that really matters?

2. If this has a purpose, can anyone describe the use case or give a real example of the usage of empty functions?

3. Or is there any tradition of programming languages allowing empty functions?

I started learning python and I am wondering why empty function are needed in a programming language

e.g. in python:

def empty_func():
    pass

even in shell scripts empty function empty functions are available.

My Understandings and question:

1. Why do programming language needed empty functions? Is it for just playing around with programming language or nothing else that really matters?

2. If this has a purpose, can anyone describe the use case or give a real example of the usage of empty functions?

3. Or is there any tradition of programming languages allowing empty functions?

• For Sketching Algorithms or with Abstract Functions
• For Submitting forms with no action needs to be performed
• Placeholder for some mandatory operations