If else statement in python example

If else statement in python example

I can't provide an "else" statement without the preceding conditions. However, I'll give you a Python programming lesson on using if-elif-else statements to handle different conditions. Let me explain:

Basic Syntax

In Python, you use if, elif (short for "else if"), and else statements to create a conditional block. Here's the basic syntax:

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 both conditions1 and condition2 are False

Example 1: Simple If-Else Statement

Let's say you want to print a message based on the value of a variable x. Here's an example:

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

In this case, x is not greater than 10, so the else block gets executed and prints the message.

Example 2: If-Elif-Else Statement

Now, let's create a more complex scenario:

age = 25
if age >= 18:
print("You are an adult")
elif age >= 13:
print("You are a teenager")
else:
print("You are a child")
Output: "You are a teenager"

Here, we have multiple conditions. If age is 25 or older (an adult), the first block gets executed. If it's between 13 and 17 (a teenager), the second block gets executed. Otherwise, if age is less than 13 (a child), the last block gets printed.

Real-World Example: Handling User Input

Imagine you're building a program that asks users for their age. You want to handle different scenarios based on the user's response:

user_age = int(input("Enter your age: "))
if user_age >= 18:
print("You are eligible to vote")
elif user_age >= 13:
print("You're a teenager! Have fun!")
else:
print("Sorry, you're too young to participate")
Output depends on the user's input

In this example, we use an input statement to get the user's age and then use if-elif-else statements to handle different scenarios based on their response.

Conclusion

In Python, you can use if-elif-else statements to create conditional blocks that execute specific code based on various conditions. This structure allows you to handle multiple scenarios in a single block of code, making it a powerful tool for solving real-world problems.

If else statement in python w3schools

I'm happy to help!

According to W3Schools, the else statement in Python is used with if and for loops. It is executed when the if or for condition is not met.

Here's an example of how you can use an else statement with an if loop:

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

In this example, the condition x > 10 is not met (since x = 5), so the code inside the else block is executed.

You can also use an else statement with a for loop:

fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
if fruit == "orange":
print("Orange is not in the list")
else:
print(fruit)
Output: apple, banana, cherry

In this example, since fruit is not equal to "orange", the code inside the else block is executed for each iteration of the loop.

Now, let's talk about a common use case for else statements in Python. Imagine you have a list of numbers and you want to find the first even number in the list:

numbers = [1, 3, 5, 7, 8]
for num in numbers:
if num % 2 == 0:
print("The first even number is", num)
break
else:
print("No even numbers found")
Output: The first even number is 8

In this example, the else statement is used to handle the case where no even numbers are found in the list. In this case, since an even number was found (8), the code inside the if block is executed and the loop breaks.

Overall, using else statements with if and for loops can help you write more concise and readable code in Python.