Has the Quran been altered from its original form since its revelation?

The question of whether the Quran has remained unchanged since its revelation to Prophet Muhammad is a central tenet for many Muslims. The Quran is preserved with a high degree of accuracy, as the text was memorized from the beginning. Early Muslims memorized and recited the Quran, while scribes recorded it. Scholars assert the Quran in use today is identical to that revealed, protected by both recitation and writing. However, some argue for variations in early Quran texts.