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Learn Python Hello World Program – Introduction
Python is an easy-to-learn language with a straightforward syntax. It encourages programmers to write clean and readable code without unnecessary boilerplate. The simplest directive in Python is the print function, which outputs a line of text to the screen.
Python Versions – Learn Python Hello World Program
There are two major versions of Python: Python 2 and Python 3. They have significant differences, but Python 3 is preferred for new projects due to its improved semantics and newer features. Python 2 is gradually being phased out.
Printing in Python – Learn Python Hello World Program
One of the differences between Python 2 and Python 3 is the print statement. In Python 2, print is not a function and is used without parentheses. In Python 3, print is a function and requires parentheses.
Example:
print("This line will be printed.")Python Indentation
Python uses indentation to define blocks of code, unlike languages like C that use curly braces. Both tabs and spaces are supported, but the standard indentation in Python is four spaces.
Example:
x = 3
if x == 3:
# indented four spaces
print("x is 3.")Change the value of the variable x from 3 to another number. For example, change it to x = 9. When the if x == 3: statement is executed, it will be false, so nothing will be printed on the screen because x is not equal to 3.
More Examples and Practice
Let’s try a few more examples to understand how print and indentation work in Python.
Example 1: Simple Greeting
name = "Alice"
print("Hello, " + name + "!")Example 2: Conditional Printing
age = 18
if age >= 18:
print("You are an adult.")
else:
print("You are a minor.")Assignment
Try the following code examples on your own. Change the values of the variables and observe the output.
Task 1: Variable Change
- Copy the code below.
- Change the value of
xfrom3to5. - Run the code and see what gets printed.
x = 3
if x == 3:
print("x is 3.")
else:
print("x is not 3.")Expected Output:
If you change x to 5, the output will be:
x is not 3.Task 2: Personalized Greeting
- Copy the code below.
- Change the value of
nameto your own name. - Run the code and see the personalized greeting.
name = "Alice"
print("Hello, " + name + "!")Expected Output:
If you change name to "John", the output will be:
Hello, John!Conclusion
Python’s simplicity and readability make it an excellent choice for beginners and experienced programmers alike. Understanding the basics of printing and indentation will set a strong foundation for further learning.
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Hello World Program | Python Tutorial – Learn Python Hello World Program
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Python for Beginners – Learn Python in 1 Hour
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