Python Control structures are an essential aspect of any programming language. They determine the control and the flow of the code so it can transform into logic. They are also known as Python control flow statements.
Control structures are responsible for deciding the flow and lead the program into a successive path to generate a desired output. In this article, we will learn three Python control structures.
Computer programs are said to be shaped into the control structures or the control flow that are nothing but a block of decisions that analyze the flow through instructions.
All the decisions are made based on two categories, the data and instructions to provide a particular response.
When you deal with data, you try to understand the nature of it (data type), and when you deal with instructions you need to understand on what basis are, they are being made on. Python Control structures, defines the instructions to be taken through appropriate statements
There are three types of Python control structures.
- Selection
- Sequential
- Repetition (iteration).
Table of Contents
1. Python Sequential
Flow of a program that executes in an order, without skipping, jumping or switching to another block of code.
You cannot execute the second instruction before executing the instruction above it. Also, you cannot divide a sum which has not been calculated.
2. Python Selection
The best examples of selection control structures in Python are if-else statements and dictionary mapping, switcher.
This is where the program takes decisions on a particular criteria. In the above example, if the age is greater than 17 then you can vote or else you can’t vote. The control is given to the code which passes the condition set.
3. Python Repetition
This is when a certain chunk of code needs to be repeated until a given number of times. For example, you need to print the record of all the students on their mark sheet.
Now it’s would be easy to repeat this activity for all students through repetitive or iterative control structure. The most common examples in python are for and while loops.
Similarly, printing student records through a for loop
Conclusion
You can use the Python control structures individually, nest one flows into another, or combine multiple flows. As the logic becomes more complicated, the structure can get messy, but with a steady trace of the flow can find an execution path.
