Substring returns characters from a string, starting from the specified position, or index. Index values start with the number 0. Examples: substring('This_is_a ...

With more than a decade of experience, Nelson covers Apple and Google and writes about iPhone and Android features, privacy and security settings, and more. Artificial intelligence has become almost ...

When Motorola introduced its first mobile phone in 1984, the company hoped for a buying frenzy. But even the best marketers couldn’t have predicted the success of mobile phones. Today, mobile phones ...