How do nested if-else statements work in different programming languages?

Can you explain how nested if-else statements work in Python?

Sure! In Python, nested if-else statements allow you to check multiple conditions. Here's a simple example:

if condition1:
    if condition2:
        # do something
    else:
        # do something else
else:
    # do something different

What about in Java? Is it similar?

Yes, it's quite similar in Java. Here's how you can write nested if-else statements:

if (condition1) {
    if (condition2) {
        // do something
    } else {
        // do something else
    }
} else {
    // do something different
}

How does it differ in JavaScript?

In JavaScript, the syntax is also similar. Here's an example:

if (condition1) {
    if (condition2) {
        // do something
    } else {
        // do something else
    }
} else {
    // do something different
}

Can you give me a real-world example of using nested if-else?

Certainly! A real-world example could be a grading system where you check the score and determine the grade:

if score >= 90:
    grade = 'A'
else:
    if score >= 80:
        grade = 'B'
    else:
        grade = 'C'