Last login: Wed Jan 19 09:43:35 on ttys002

The default interactive shell is now zsh.
To update your account to use zsh, please run `chsh -s /bin/zsh`.
For more details, please visit https://support.apple.com/kb/HT208050.
MAC:Wed Jan 19:10:02:~> ssh morrison@cs.ncssm.edu
morrison@cs.ncssm.edu's password: 
Last login: Wed Jan 19 09:23:28 2022 from 172.31.248.160
CSWed Jan 19:10:03:~> node
> true
true
> false
false
> !true
false
> !false
true
> true or false
true or false
     ^^

SyntaxError: Unexpected identifier

> true || true
true
> true || false
true
> false || true
true
> false || false
false
> true && true
true
> true && false
false
> false && false
false
> false && true
false
> true ^ true
0
> true ^ false
1
> false ^ true
1
> false ^ false
0
> Boolean(true ^ true)
false
> Number("3423")
3423
> "" + 2332
'2332'
> "" + true
'true'
> // relational opeators >= <= < > 
undefined
> 5 == "5"
true
> 5 === "5"
false
> 5 === Number("5")
true
> //  === isequalto  !== negation of ===
undefined
> //don't use ==.
undefined
> // Warner warning: do not compare items of different types
undefined
> //using relatoinal operators.
undefined
> 3 < "a"
false
> "3" < "a"
true
> 4*4 < 5*3
false
> 5 - 3 < 2 + 7
true
> let q = 5 - 3 < 2 + 7
undefined
> let r = (q = 6)
undefined
> r
6
> q
6
> let c = 14
undefined
> c
14
> 5 < c < 20
true
> 5 <= c <= 20
true
> 5 <= c && c <= 20
true
> d
ReferenceError: d is not defined
> c
14
> c += 5;
19
> c
19
> //compound assignment
undefined
> //  op is infix binary, x op= y is x = x op y
undefined
> c
19
> c += 2*5
29
> c += 2 + 3
34
> c += 2 * 3
40
> c - 1
39
> c = 1
1
> c *= 2 + 5
7
> c = 1
1
> c = c*(2 + 5)
7
> c = 1
1
> c = c*2 + 5
7
> CSWed Jan 19:10:30:~>