up

Author: xieyuheng

README.md

@@ -16,12 +16,18 @@ An interpreter of [lambda calculus](https://en.wikipedia.org/wiki/Lambda_calculu
 (let ([name exp] ...) body)
 ```
 
-## Install
+## Usages
+
+### Command line tool
+
+Install it by the following command:
 
 ```sh
-npm install @xieyuheng/x-data.js
+npm install -g @cicada-lang/lambda.js
 ```
 
+The command-line program is called `lambda.js`.
+
 ## Development
 
 ```sh