Learn Python
- Python basic
- Introduction to File Handling
- Basics of List Comprehension
- Introduction to Matplotlib
- Classes and Objects
- Introduction to Functions
- Python Numbers
- Creating Basic Plots
- Opening and closing files
- Function parameters and arguments
- Advanced Techniques
- Attributes and Methods
- Python Strings
- Scope and lifetime of variables
- Advanced Plotting
- Reading from files
- Performance and Limitations
- Encapsulation
- Python List
- Specialized Plots
- Writing to files
- Return statement and output
- Inheritance
- Python Tuple
- Advanced Customization
- Working with different file formats
- Lambda Functions
- Polymorphism
- Practical Applications
- Higher-Order Functions
Flow control
Introduction to Flow Control
Flow control refers to the mechanism that determines the order in which instructions in your program are executed. By default, in Python (and most programming languages), code executes line by line, from top to bottom. However, programs often need to make decisions and repeat tasks based on certain conditions. This is where flow control comes in.
Importance of flow control in programming:
Imagine a program checking user input. Based on the input (yes or no), the program needs to execute different parts of the code. Flow control allows us to write code that behaves differently depending on various conditions.
Many tasks involve repetitive actions. Flow control allows us to write code that executes a block of instructions multiple times, saving you from writing the same code repeatedly.
Flow control helps structure your code logically, making it more efficient and easier to understand and maintain.
Different types of flow control in Python:
Python provides two main types of flow control mechanisms, the conditional statement and Loops
1. Conditional Statements:
These statements allow you to execute different code blocks based on whether certain conditions are true or false. The most common conditional statement is the if statement, along with its variations like else and elif (else if).
2. Loops:
These statements allow you to execute a block of code repeatedly until a certain condition is met. Python offers two main loop types:
These statements allow you to execute a block of code repeatedly until a certain condition is met. Python offers two main loop types:
- while loop: This loop continues executing its code block as long as a specified condition remains True.
- for loop: This loop iterates over a sequence of elements (like a list or string), executing its code block for each element.
By combining these flow control mechanisms, you can create powerful and versatile programs in Python.
It's time to take a quiz!
Test your knowledge and see what you've just learned.
What is the main purpose of flow control in programming?
ATo execute all instructions in order
BTo organize code into functions
CTo determine the order of instruction execution
DTo compile the code into machine language
Check Answer
Which of the following is a common conditional statement in Python?
Awhen
Bif
Cdo
Dfor
Check Answer
What type of loop continues executing as long as a condition is True?
Awhile loop
Bfor loop
Cdo while loop
Dnested loop
Check Answer
What does a for loop iterate over in Python?
AA fixed number of times
BA range of values
CA sequence of elements
DAn indefinite number of times
Check Answer
Why is flow control important in programming?
DIt is only used in advanced programming
AIt allows for decision-making and repetition
BIt makes code harder to understand
CIt limits code execution to one time
Check Answer