Update chapter10.md

chapter10.md

@@ -1 +1,31 @@
+## Chapter 10: Sentiment Analysis
+You can use LangChain to do sentiment analysis on text.
 
+
+```
+from langchain.prompts import PromptTemplate
+from langchain.llms import OpenAI
+from langchain.chains import LLMChain
+
+
+template = """
+Analyze the sentiment of the following text:
+
+Text: {text}
+
+Sentiment (positive/negative/neutral):
+"""
+
+prompt = PromptTemplate(
+    input_variables=["text"],
+    template=template
+)
+
+
+chain = LLMChain(llm=OpenAI(temperature=0), prompt=prompt)
+
+
+text = "I love using LangChain for AI development. It's so powerful and easy to use!"
+print(chain.run(text))
+
+```