ruby strings and symbols

i want to explain the difference between strings and symbols in ruby. strings are surrounded by single or double quotes, symbols starts with colon.

strings are equal

"hello" == 'hello'
=> true

:hello == :hello
=> true

but string and symbol aren’t

"hello" == :hello
=> false

the other thing is that strings are mutable objects but symbols aren’t. also each string has its own place in memory allocated. symbols share same space in heap