User Defined Functions (Videos on YouTube)

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The recommendation is that you view the videos listed below in sequence

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1. ​Why we have Python functions >>
   
2. Python User Defined Function >>
   
3. How to design a Python function >>
   
4. Python Function with arguments and no return value >>
   
5. Python Function with no arguments but return value >>
   
6. Python Function with no arguments and no return value >>
   
7. Python Keyword Arguments for functions >>
   
8. Python Default Arguments for functions >>
   
9. Local and Global Variable Scope >>
   
10. Lifetime of Variables >>
    
11. In functions do not directly access global variable >>
    
12. Python Parameter Passing Mechanism >>