Boolean data type
Boolean variables are stored as 16-bit (2-byte) numbers, but they can only be True or False.
Boolean variables display as either:
False(when Print is used), or
#FALSE#(when Write # is used).
Use the keywords True and False to assign one of the two states to Boolean variables.
When other numeric types are converted to Boolean values, 0 becomes False and all other values become True.
When Boolean values are converted to other data types, False becomes 0 and True becomes -1.