What is the difference between if-else and switch?

Can you explain the difference between if-else and switch statements?

Sure! Both if-else and switch are control flow statements, but they serve different purposes. If-else is used for evaluating conditions, while switch is used for selecting one of many code blocks to execute based on a variable's value.

When should I use switch instead of if-else?

You should use switch when you have multiple conditions based on the same variable, as it can be cleaner and more readable than multiple if-else statements.

Are there any performance differences between them?

In general, switch can be more efficient than if-else when dealing with many conditions, as it may use a jump table. However, the difference is often negligible for a small number of conditions.

Can you give me an example of both?

Of course! For if-else:

if (day === 'Monday') {
    console.log('Start of the week');
} else if (day === 'Friday') {
    console.log('End of the week');
} else {
    console.log('Midweek');
}

For switch:

switch (day) {
    case 'Monday':
        console.log('Start of the week');
        break;
    case 'Friday':
        console.log('End of the week');
        break;
    default:
        console.log('Midweek');
}