Python Function and Looping
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The document explains the concept of functions in Python, highlighting their purpose to perform specific tasks, streamline code, and reduce repetition. It distinguishes between built-in functions and user-defined functions, and describes how Python's looping structure, particularly for loops, allows for the repetition of processes efficiently. An example is provided to demonstrate how to use loops to iterate through elements in a list.
![Python offers us an easy way to repeat
a process, which helps us when we
need to repeat a process hundreds,
thousands, or even millions of times.
Let's say we have a list [3, 5, 1, 2]
assigned to a variable ratings, and we
want to repeat the following process:
for each element in ratings, print its
index and itself. This is how we could
translate that into Python syntax:
LOOPING IN
PYTHON](https://image.slidesharecdn.com/pythonfunctionandlooping-210327165323/85/Python-Function-and-Looping-6-320.jpg)
Python Function and Looping
- 1. Function & Looping Python Programming Language
- 2. In Python, a function is a group of related statements that performs a specific task. It help us work faster, simplify our code and avoids repetition.
- 3. It takes in an input. It does something to that input. It gives back an output. Generally, a function displays this pattern:
- 5. Built-in functions - Functions that are built into Python. Ex: sum(), max(), etc. User-defined functions - Functions defined by the users themselves. Basically, we can divide functions into the following two types: 1. 2. TYPE OF FUNCTION
- 6. Python offers us an easy way to repeat a process, which helps us when we need to repeat a process hundreds, thousands, or even millions of times. Let's say we have a list [3, 5, 1, 2] assigned to a variable ratings, and we want to repeat the following process: for each element in ratings, print its index and itself. This is how we could translate that into Python syntax: LOOPING IN PYTHON
- 7. The technique used previously is called a loop, because we always start with for (like in for some_variable in some_list:), this technique is known as a for loop. STRUCTURE OF LOOPING