Що поверне вираз arr.lastIndexOf(30) для масиву const arr = [10, 20, 30, 40]?

✅ The verified answer to this question is available below. Our community-reviewed solutions help you understand the material better.

Want instant access to all verified answers on do.ipo.kpi.ua?

Get Unlimited Answers To Exam Questions - Install Crowdly Extension Now!

Add to Chrome