How to pronounce f in English

"F is the sixth letter of the English alphabet and a nonvocal consonant. Its form and sound are from the Latin. The Latin borrowed the form from the Greek digamma / which probably had the value of English w consonant. The form and value of Greek letter came from the Phoenician the ultimate source being probably Egyptian. Etymologically f is most closely related to p k v and b; as in E. five Gr. pe`nte; E. wolf L. lupus Gr. ly`kos; E. fox vixen ; fragile break; fruit

"The name of the fourth tone of the model scale or scale of C. F sharp (F /) is a tone intermediate between F and G."