Does the word East have to a period at end when abbreviated?

No, the abbreviation "East" does not need a period at the end.

Here's why:

* Common Usage: The abbreviation "East" is widely accepted as a standalone word, not requiring a period.

* Formal vs. Informal: While periods are used in formal writing for some abbreviations (e.g., Dr., Mr., Mrs.), "East" is typically used in an informal context, like addresses or directions, where periods are generally omitted.

Examples:

* "I live in the East."

* "They traveled East."

* "Turn East at the next light."