The pattern behind Morse numbers
Numbers are the easiest part of Morse code to learn because they follow a clear rule. Each has exactly five symbols. For 1 to 5, the number tells you how many dots come first, followed by dashes: 3 is ...--. For 6 to 9, subtract five to get the number of dashes, followed by dots: 7 is --.... Zero is five dashes.
Cut numbers
Radio operators often shorten numbers to save time. The most common are 9 → N and 0 → T, which is why a perfect signal report of 599 is heard as "5NN". Cut numbers are only used when both sides know a number is expected, such as in contests.
For letters see the Morse alphabet chart, or convert full sentences in the Morse translator.