Boolean refers to logical relationships

True or False, and is named
after mathematician George Boole.
//There are four values which JavaScript treats as False. All other values are True
0 zero
""
zero length string
null
null
value
undefine variables whose value has yet to be assigned
Boolean values used
in
mathematical expressions are converted to mathematical values as follows
:
False becomes 0 i.e. False
*
2
=
0
True becomes 1 i.e. True
*
5
=
5
If A Then
'0 value is treated as False
'nonzero value is treated as True
End If