Symbol (Colon in Ruby)

Symbol: Denotes "First name", such as the name of the string, the name of the identifier.

How to create a Symbol object: precede a name or string with a colon

: Test: " Hello Ruby "

In Ruby, each object has a unique object identifier (Identifier), which can be used to get an identifier for an object using the Object_ID method.

Look at the difference between a Symbol object and a String object:

puts:str.object_id#710748puts:str.object_id#710748puts:str.object_id#710748Puts"..............."puts"Hello". object_id#21458200Puts"Hello". object_id#21458140Puts"Hello". object_id#21458080

Symbol (Colon in Ruby)