Joining Group - Noon

Noon is a joining group designation for a specific Arabic letter form, representing the glyph shape and cursive connection behavior of the letter noon in its isolated, initial, medial, and final positions within a word. In scripts that use Arabic-based writing systems, this group defines how the noon character connects to adjacent letters, particularly influencing whether it joins to the right, the left, both sides, or neither, depending on its contextual variant. The value helps shape rendering, ensuring that the letter’s tail and loop appear correctly when linked with preceding or following characters, such as in Urdu, Persian, or Sindhi. Noon’s joining behavior is typical of most Arabic letters, as it pairs with other joining groups to form connected text, but it is distinct from non-joining or dual-joining groups like Beh or Dal. This classification supports accurate text shaping for digital typography and script rendering.