The letter "ج" is the fifth letter of the Arabic alphabet. It is pronounced as "jeem" and has a sound similar to the English "j" in "jam." In Arabic script, "ج" is written in different forms depending on its position in a word: initial, medial, or final. In terms of numerical value, "ج" represents the number 3 in the Arabic numeral system. It is commonly used in various Arabic words, including جمل (camel) and جميل (beautiful). The letter plays a significant role in the phonetics of the Arabic language.