Answer:
True.
Step-by-step explanation:
En dashes (-) are shorter than em ones. They have the length of an N. We use them to indicate periods, to connect words, or to indicate periods or a set of numbers, like in the example "pages 175-176".
Em dashes (—) have the length of the letter M. We use them to add information as if they were brackets, as commas to introduce a clarification in a sentence, and lastly to show that an action is interrupted.