What is the difference between a simple sentence and a compound sentence in terms of their function?

Sure, here's the difference between a simple sentence and a compound sentence:

Simple Sentence:

• A single independent clause.
• Contains a subject and a predicate.
• Expresses a single thought or idea.

Compound Sentence:

• Two or more independent clauses joined by a coordinating conjunction.
• Contains a subject and a predicate for each clause.
• Expresses a thought that is made up of two or more ideas.

Example:

Simple Sentence:

The dog barked.

Compound Sentence:

The dog barked at the mailman.