how to use datepipes symbol on angular code example

Example 1: pipe of date angular

content_copy
      
{{ dateObj | date }}               // output is 'Jun 15, 2015'
{{ dateObj | date:'medium' }}      // output is 'Jun 15, 2015, 9:43:11 PM'
{{ dateObj | date:'shortTime' }}   // output is '9:43 PM'
{{ dateObj | date:'mm:ss' }}       // output is '43:11'

Example 2: short date angular pipe

'short': equivalent to 'M/d/yy, h:mm a' (6/15/15, 9:03 AM).
'medium': equivalent to 'MMM d, y, h:mm:ss a' (Jun 15, 2015, 9:03:01 AM).
'long': equivalent to 'MMMM d, y, h:mm:ss a z' (June 15, 2015 at 9:03:01 AM GMT+1).
'full': equivalent to 'EEEE, MMMM d, y, h:mm:ss a zzzz' (Monday, June 15, 2015 at 9:03:01 AM GMT+01:00).
'shortDate': equivalent to 'M/d/yy' (6/15/15).
'mediumDate': equivalent to 'MMM d, y' (Jun 15, 2015).
'longDate': equivalent to 'MMMM d, y' (June 15, 2015).
'fullDate': equivalent to 'EEEE, MMMM d, y' (Monday, June 15, 2015).
'shortTime': equivalent to 'h:mm a' (9:03 AM).
'mediumTime': equivalent to 'h:mm:ss a' (9:03:01 AM).
'longTime': equivalent to 'h:mm:ss a z' (9:03:01 AM GMT+1).
'fullTime': equivalent to 'h:mm:ss a zzzz' (9:03:01 AM GMT+01:00).