IF - if statement in python

In Python, the if statement is used for conditional execution. It allows you to execute a block of code if a certain condition is true. The basic syntax of an if statement is as follows:

if condition:
    # Code to be executed if the condition is True

Here's a breakdown of how the if statement works:

• if: The keyword that starts the conditional statement.
• condition: A Boolean expression that evaluates to either True or False. If the condition is True, the code inside the if block will be executed. If the condition is False, the code inside the if block is skipped.
• : (colon): A colon is used to indicate the beginning of the code block that should be executed if the condition is true.
• Indentation: Python uses indentation (whitespace) to define the scope of code blocks. All code within the if block must be indented with the same amount of whitespace.

Here's an example of an if statement in action:

x = 10

if x > 5:
    print("x is greater than 5")

In this example, the condition x > 5 is true (since x is 10), so the print statement is executed.

You can also include an else block to specify what should happen if the condition is False:

x = 3

if x > 5:
    print("x is greater than 5")
else:
    print("x is not greater than 5")

In this case, since x is 3 (which is not greater than 5), the code inside the else block is executed.

Additionally, you can use elif (short for "else if") to specify multiple conditions to be checked in sequence:

x = 3

if x > 5:
    print("x is greater than 5")
elif x == 5:
    print("x is equal to 5")
else:
    print("x is less than 5")

In this example, the first condition is False, so Python checks the next condition (x == 5). Since that is also False, it executes the code in the else block, printing "x is less than 5."

 

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