The importance of declaring a variable as unsigned

Question

Is it important to declare a variable as unsigned if you know it should never be negative? Does it help prevent anything other than negative numbers being fed into a function th

Answer 1

As an aside, I seldom use int or unsigned int, rather I use either {int16_t, int32_t, ... } or {uint16_t, uint32_t, ...}. (You have to include stdint.h to use them though.) I am not sure how my colleagues find it, but I try to convey the size of the variable this way. In some places, I try to be more blatant by doing some thing like: typedef uint32_t Counter32;