···−−
// MORSE · DIGIT
The digit 3 in Morse
the digit 3 is coded ···−− — five symbols. One of the regular digits in the system, identical between continental and international Morse.
Memory hook
Three dots, two dashes — middle exactly.
CW phonetic: say "di di di daa daa" out loud. "di" is short, "daa" is three times longer.