Working of REGISTER VARIABLES in C

Working of REGISTER VARIABLES in C

#include 
main()
{
   register int i = 0;

   for( i=0;i<2;i++)     {         printf("value of i is %d\n",i);     } }  

Explanation :

• Here the register allocation directive is given for variable i. During execution, i will be allocated a register if it is available; otherwise, i will receive normal memory allocations.
• You can use a register directive only for variables of the automatic storage class, not for global variables.
• Generally, you can use register storage for int or char data types.