There are four values which JavaScript treats as false. All other values are true:

0		zero
""		zero length string
null		special null value
undefined		value has not been assigned

Boolean values may be used in mathematical expressions and are converted to mathematical values as follows:

• false becomes 0
• true become 1

Examples:

false * 2    //evaluates to 0
true * 5     //evaluates to 5
if A then
    '0 value is treated as False
    'non-zero value is treated as True
end if