true-or-false.md

Runtime

Play Code

https://playcode.io/1593412

Node.js

tsc true-or-false.ts --outFile myOutput.js

node myOutput.js

node true-or-false.js

$ node true-or-false.js
Using == comparison:
true is true
false is false
1 is true
-1 is neither true nor false
hello is neither true nor false
0 is false
false is neither true nor false
[object Object] is neither true nor false
 is false
function() {} is neither true nor false
0 is false
 is false
null is neither true nor false
undefined is neither true nor false
NaN is neither true nor false

Using === comparison:
true is true
false is false
1 is neither true nor false
-1 is neither true nor false
hello is neither true nor false
0 is neither true nor false
false is neither true nor false
[object Object] is neither true nor false
 is neither true nor false
function() {} is neither true nor false
0 is neither true nor false
 is neither true nor false
null is neither true nor false
undefined is neither true nor false
NaN is neither true nor false

Using == comparison:

Value	Evaluation
true	True
false	False
1	True
-1	Neither true nor false
"hello"	Neither true nor false
"0"	Neither true nor false
"false"	Neither true nor false
{} (Object)	Neither true nor false
[] (Array)	Neither true nor false
function() {}	Neither true nor false
0	False
"" (Empty String)	False
null	Neither true nor false
undefined	Neither true nor false
NaN	Neither true nor false

Using === comparison:

Value	Evaluation
true	True
false	False
1	Neither true nor false
-1	Neither true nor false
"hello"	Neither true nor false
"0"	Neither true nor false
"false"	Neither true nor false
{} (Object)	Neither true nor false
[] (Array)	Neither true nor false
function() {}	Neither true nor false
0	Neither true nor false
"" (Empty String)	Neither true nor false
null	Neither true nor false
undefined	Neither true nor false
NaN	Neither true nor false