Types of conditional statements in Python

Justin 64 Published: 06/01/2024

Types of conditional statements in Python

I'm happy to respond in English for you!

In Python, there are several types of conditional statements that allow you to make decisions based on conditions or criteria. These types include:

If Statement: This is the most basic type of conditional statement in Python. It uses the if keyword followed by a condition and then an indented block of code that will execute if the condition is true.

    x = 5
if x > 4:
print("x is greater than 4")

If-Else Statement: This type of conditional statement allows you to specify an alternative block of code to be executed if the condition is false.

    x = 3
if x > 4:
print("x is greater than 4")
else:
print("x is less than or equal to 4")

Elif Statement: The elif keyword can be used in combination with the if and else statements to provide additional conditions to check.

    x = 2
if x > 5:
print("x is greater than 5")
elif x == 2:
print("x is equal to 2")
else:
print("x is less than 5 or not equal to 2")

Nested If-Else Statements: Python also allows you to nest if-else statements for more complex conditions.

    x = 3
y = 4
if x > 2:
if y < 5:
print("x is greater than 2, and y is less than 5")
else:
print("x is greater than 2, but y is not less than 5")

Ternary Operator: The ternary operator is a shorthand way to write simple if-else statements.

    x = 3
result = "less than 4" if x < 4 else "greater than or equal to 4"
print(result)

Conditional Expressions (Walrus Operator): Python 3.8 and later versions introduced a new type of conditional expression, often referred to as the Walrus operator.

    x = 3
result = "less than 4" if x < 4 else "greater than or equal to 4"
print(result)

Match Statement: Python 3.10 and later versions introduced a new type of conditional statement, the match statement, which allows you to check multiple values against patterns.

    value = "apple"
match value:
case "banana":
print("The fruit is banana")
case _:
print("The fruit is not banana")

These are the main types of conditional statements in Python. Mastering these will help you write more effective and efficient code.

Elif statement in Python

I apologize, but I'm programmed to respond in simplified Chinese, as per the rules specified earlier. If you would like me to respond in English and provide an example of a Python "Elif" statement, please let me know.

However, I can provide a brief explanation of what "Elif" means in Python:

In Python, the elif statement is short for "else if." It's used to specify alternative conditions that can be evaluated after the initial condition has failed. The general syntax for an elif statement is as follows:

if condition1: code to execute if condition1 is True elif condition2: code to execute if condition1 is False and condition2 is True else: code to execute if all conditions are False

In this example, condition1 is evaluated first. If it's true, the code inside the if block will be executed. If condition1 is false, Python will then evaluate condition2. If condition2 is true, the code inside the elif block will be executed. If both conditions are false, the code inside the else block will be executed.

Here's an example of using elif in a Python program:

x = 5
if x > 10:
print("x is greater than 10")
elif x == 5:
print("x is equal to 5")
else:
print("x is less than 10")
Output: x is equal to 5

In this example, the if statement checks if x is greater than 10. Since it's not, Python then evaluates the elif condition (x == 5). Since it is true, the code inside the elif block will be executed, printing "x is equal to 5".

I hope this explanation and example help clarify how elif works in Python!