What are the differences between if-else and switch-case statements?

What are the differences between if-else and switch-case statements?

If-else statements evaluate conditions sequentially, while switch-case evaluates a single expression against multiple cases.

When should I use switch-case instead of if-else?

Use switch-case when you have multiple discrete values to compare against a single variable, as it's often cleaner and more readable.

Can you give me an example of both?

Sure! For if-else:

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

For switch-case:

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

Are there any performance differences between them?

In most cases, the performance difference is negligible, but switch-case can be faster for a large number of cases due to optimizations.