C Programming
Which of the following is the correct way of declaring a float pointer:

None of these
float ptr;
float *ptr;
*float ptr;

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C Programming
What is the difference between a declaration and a definition of a variable?

There is no difference between them.
A declaration occurs once, but a definition may occur many times.
A definition occurs once, but a declaration may occur many times.
Both can occur multiple times, but a definition must occur first.
Both can occur multiple times, but a declaration must occur first.

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