When to use -, – and —? [duplicate]
Solution 1:
Hyphens are used in compound modifiers.
- a well-trained professional
- over-the-counter drugs
En dashes are used in place of "to" to connect numbers or words.
- The London–Amsterdam flight is delayed.
- The meeting is from 3:00–4:30 p.m.
Em dashes help set off amplifying or explanatory statements.
- The vampire—it had been awake half the night—flew out of its coffin.