The Unicode character commonly displayed as the face with tears of joy emoji is U+1F602.
U+1F602 is officially named FACE WITH TEARS OF JOY and depicts a laughing face with tears at the eyes. It became one of the most recognizable emoji worldwide because it can represent intense amusement in text conversations where vocal tone and facial expression are absent.
The character is separate from ROFL, U+1F923, whose official name is ROLLING ON THE FLOOR LAUGHING. Both can express strong laughter, but their designs and code points differ. GRINNING FACE, U+1F600, is also a separate character and generally conveys a broad smile without tears.
Emoji artwork has changed across software updates, and early platform designs did not look identical. The Unicode code point, however, remains the stable identifier shared by compatible systems.