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What are the data sizes of all the primitive datatypes on a Metro M4 Express SAMD51 C++ implementation? In some C++ implementations, int has 16 bits and in other implementations it has 32 bits. Is

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    It depends on compiler's data model for target processor. But I'd rather use int16_t/int32_t instead. It's much better for portability. – KIIV Oct 28 '19 at 19:40
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And that is the only difference in fundamental type sizes. On 8-bit Arduinos int is 16 bit and on 32-bit int is 32 bit.

  • short is 16 bit
  • long is 32 bit
  • long long is 64 bit

https://en.cppreference.com/w/cpp/language/types

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