Letter j is present in all Latin alphabets. It represents a voiced palatal approximant sound, [ [d͡ʒ:]] or [ [ʒ]], depending on the phonetic system of a particular language. Historically, j was a variant of the letter i but it later became independent.

The lowercase j is used to denote one of the basic vectors, an imaginary quantity, jerk, a secondary index in programming and mathematics. These goals can be achieved with the help of symbol [U:1D457] from the block with [URL /blocks/mathematical-alphanumeric-symbols/ mathematical letters and numbers].

The double-struck italic lowercase j comes in handy when you need to write words in English, French, German, and other languages. Use the double-struck letter to decorate your text.