What are the differences between the following two sentences?

The first sentence is an exclamation sentence, and the second sentence is a declarative sentence! Exclamatory sentences are used to express some strong emotion (such as joy, anger, surprise or sadness, etc.). Exclamatory sentences expressing joy, anger, and surprise generally use a high and flat sentence tone, while exclamatory sentences expressing sadness generally use a low and descending sentence tone. The function of the declarative sentence is to state a fact. The declarative sentence expresses the declarative mood, and the tone of the sentence is a falling tone.