Linux Command - Some useful tools

Show the file type ?
# type ulimit
ulimit is a shell builtin
# type vi
vi is aliased to `vim'
# type mysql
mysql is /usr/bin/mysql
# type mysqld_safe
mysqld_safe is /usr/bin/mysqld_safe

Question:
The "type" command is similar to the "file" command. What is the difference?
Answer:
The "file" command is used to determine the file type of a specified file.
And "type" command is used to determine the type of executable program. And "type" will also point the entire path of the specified program in the current file system.