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    Program Flows in Python – Conditional Statements and Boolean Expressions Controls the Program Flow

    What Program Flows are in Python?

    You will learn what program flows are in Python, and how this links to conditional statements and boolean expressions in Python.

    In this tutorial, you will:

    • Understand Program Flows in Python: Learn the concept of program flows, which determine the order in which instructions are executed in a Python program.
    • Explore Conditional Statements: Discover how conditional statements, such as if-else and elif, allow for different paths and decision-making within a program based on specific conditions.
    • Connect with Boolean Expressions: Understand the relationship between program flows and boolean expressions, which evaluate to either true or false, influencing the execution of conditional statements.

    By the end of the tutorial, you will have a clear understanding of program flows in Python and their connection to conditional statements and boolean expressions. This knowledge will empower you to create dynamic and flexible programs that can adapt and respond based on different conditions and inputs.

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    Step 1: Let’s recall what boolean expressions are

    Boolean expression is the building block of conditional statements. So let’s make a brief recap of it.

    Given two variables a and b, we have the following boolean expressions with them.

    • Equals: a == b
    • Not Equals: a != b
    • Less than: a < b
    • Less than or equal to: a <= b
    • Greater than: a > b
    • Greater than or equal to: a >= b

    Where depending on the values in a and b the expressions will evaluate as True or False.

    Step 2: Conditional statements

    Let’s demonstrate a few if-statements here.

    Equality between variables.

    a = 10
    b = 10
    if a == b:
        print("a equals b")

    Notice, that if a was not equal to b, then it would not print the statement. That is, the indented code after the if-statement is only executed if the boolean expression evaluates to True.

    Another example of less-than.

    a = 10
    b = 8
    if a < b:
        print("a is less than b")

    Again the same principles apply.

    You can also have an else clause.

    a = 12
    b = 12
    if a > b:
        print("a is greater than b")
        print("a is not greater than b")

    And an elif-clause.

    a = 13
    b = 12
    if a > b:
        print("a is greater than b")
    elif a == b:
        print("a is equal to b")
        print("a is less than b")

    And a not-equal statement.

    a = 10
    b = 10
    if a != b:
        print("a does not equal b")

    What next?

    In the next lesson you will create your own Rock-Scissor-Paper game in Python.

    If this is something you like and you want to get started with Python, then this is part of an 8 hours FREE video course with full explanations, projects on each level, and guided solutions.

    The course is structured with the following resources to improve your learning experience.

    • 17 video lessons teaching you everything you need to know to get started with Python.
    • 34 Jupyter Notebooks with lesson code and projects.
    • A FREE eBook to support your Python learning.

    See the full FREE course page here.

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    4 thoughts on “Program Flows in Python – Conditional Statements and Boolean Expressions Controls the Program Flow”

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