Default variable value

Question

If I don\'t assign a value to a variable when I declare it, does it default to zero or just whatever was previously in the memory?

e.g.

float x;
         


        

Answer 1

It depends. If this is a local variable (an object with automatic storage duration) it will be uninitialized, if it is a global variable (an object with static storage duration) it will be zero initialized. Check also this answer.