Floating point subtraction works on float and double. Floating point subtraction results in a fractional value that can be represented in IEEE (Institute of Electrical & Electronics Engineers) format.
Subtraction is left associative. That means a - b - c means (a - b) - c not a - ( b - c ). Subtractions are performed left to right.
- can also be used an a unary operator, e.g. a = -b;
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