1//First go in the folder where you want to add new component in angular then use given command
2ng g c componentName 
3//or
4ng generate component componentName
5
6//If you are in root folder and want to make a sub component then 
7// componentName is complete path of that folder with componentName
8

1ng generate component [component-name]
2

1ng generate component component-name

1ng g c componentName

1      ng generate component hero-detail

1      
2      ng generate component <name> [options]
3