9. Functions
Functions play a vital role in programming by allowing code to be organized into logical blocks that can be reused multiple times with different inputs. When calling a function, arguments can either be mutable or immutable, affecting how the values are passed and modified within the function. Understanding function definitions, invocation, scope, and recursion are fundamental to writing effective Python programs.
Sections
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What we have learnt
- Functions are groups of statements that perform specific tasks and can be reused in a program.
- Arguments passed to functions can either be mutable or immutable, affecting how they can be modified.
- Functions must be defined before being invoked in Python, ensuring that the interpreter recognizes all function calls.
Key Concepts
- -- Functions
- A function is a grouping of code that performs a specific task, defined using the 'def' statement.
- -- Parameters/Arguments
- Variables that are passed to functions to be used within them, can be mutable or immutable.
- -- Return Statement
- A command within a function that ends the function's execution and optionally returns a value to the caller.
- -- Scope
- The context in which a variable is defined and accessed, with function names being local to the function.
- -- Recursion
- A technique where a function calls itself to solve a problem, commonly used in functions like factorial.
Additional Learning Materials
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