homebrew mongodb not found code example

Example 1: intall mondg brew

$ brew services start mongodb-community

Example 2: install mongodb on mac

brew tap mongodb/brew
#step 1

Example 3: mongodb installation on mac

//Starts Mongdb server @ mongodb://127.0.0.1:27017/
brew services start [email protected]
mongod --config /usr/local/etc/mongod.conf --fork
ps aux | grep -v grep | grep mongod
mongo

Example 4: Error: No available formula with the name "mongodb"

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"