Is bool a datatype or boolean a datatype??
Which is which, i can't tell the difference?
If you look in Arduino.h, you'll find:
typedef bool boolean;
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Worth noting
Boolean in Arduino land still occupies a full byte.
If you’re keen, try implementing bit fields as manually setting, clearing bits in a byte defined by yourself.
8/16/32 bit is a lot more space efficient.
Are the same thing
boolean or bool . bool short for boolean.
Like integer and int. int short for integer.
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boolean is a bool in Arduino context. Not worth to use.
Just use bool.
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+1
Same as the byte data type. They are just synonyms of the real thing meant to make code supposedly more readable to some.
Learn the real thing
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The bool type occupies the space of one byte,
but it can only assume values 0 or 1. (true or false)
The byte type also occupies only one byte,
but can assume values from 0 to 15 (0x00 to 0x0F)..
sorry
but can assume values from 0 to 255 (0x00 to 0xFF).
See this example code:
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Oops
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tks
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in C++ bool is a native type, so it's not 0 or 1, it's really to be seen as holding a truth value (true or false). The fact that you can get an implicit promotion to an integral type with 0 being false and 1 being true is something else that is there for historical / C compatibility reason but should not be encouraged.
Note also that the value of sizeof(bool) is implementation defined and might differ from 1 - so from a pure standard perspective a bool could occupy more than 1 byte.
for more on types, read Fundamental types - cppreference.com
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Recently I was looking at a some disassembled programming, and it came to me why the discussion about bool, Boolean and datatypes is so confusing. The question asked is something like: is it char? Is it byte? 1 or 2 bnytes?
Bool or Boolean is usually not used as data but as the choice to take a certain jump or not. Therefore the question whether it is 1 byte or 2, type char, byte or int, is missing the point.
In C++ a datatype bool is defined, because the compiler needs to deal with condition jumps, but it is not byte, char or int!
bool is the official C++ data type for a truth value
boolean is something arduino defined to be fancy 
but it's the same thing
the standard says
Boolean type
bool — type, capable of holding one of the two values: true or false. The value of sizeof(bool) is implementation defined and might differ from 1.
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