Informative language is used by people who have fact-based professions, such as scientists, journalists and engineers. The goal of informative language is to communicate information. Expressive language is used by writers, poets, actors and singers, who use it to express emotion, feelings and attitudes.
The function of informative language is to state facts and often affirm or deny propositions. People who use informative language share facts and reason while those who engage in expressive language use it to share what they are feeling or evoke those feelings from others, often regardless of facts or reason.
Informative language has truth value, meaning those using it strive to be either true or false. For this reason, it is valuable when interpreting logic. Expressive language isn't true or false because it conveys feelings, emotions and opinions.
You can find informative language examples in newspaper articles and scientific studies, as well as in simple speech when the person shares a fact. Examples of informative language sentences include: "Christmas is a holiday" and "Five plus five equals 10." You can find expressive language examples in poems, novels and plays, or when a person shares an opinion or emotion. Examples of expressive language sentences are, "Mondays are my favorite days" and "Her betrayal made me think life wasn't worth living."