memory - How garbage values are assigned to variables in c

Question

C code :

int a;
printf("
 %d",a); // It'll print some garbage value;

So how does these garbage values are assigned to uninitialized variables behind the curtains in C?

Does it mean C first allocates memory to variable 'a' and then what ever there is at that memory location becomes value of 'a'? or something else?

Answer 1

Does it mean C first allocates memory to variable 'a' and then what ever there is at that memory location becomes value of 'a'?

Exactly!

Basically, C doesn't do anything you don't tell it to. That's both its strength and its weakness.