Counting the number of times a loop has run

I need to know how many times the following loop was run and have no clue: ( I need to know how many "v"s I have calculated)

Code:

---

               
for (i = 0; i <= D; ++i) //Counting up by one for duration/burnrate values
{
float m, v = vi, h = 500;  //Find t for h = 0.0, set as td
        // Must initialize v to the initial velocity ( like v = 0)

m = masschange(duration[i], burnrate[i], total);

for (j = 0; j <= duration[i]; j = j + tstep)        // j keeps track of the amount of time each duration has run for

{                                                             
 a = ((m*G) - (burnrate[i]*ve))/m;
                               
v = v - (a*tstep);        // Like ++v, but with something else +'ing
                                     
printf("%.3f\n", v);
fprintf(outFile, "%.3f\n", v);        // Calculates the nth velocity

h = h - (v*tstep);
printf("\t%.3f\n", h); //Check to see if the height is going to 0

if (h <= 0)                // Stops when h = 0.
{
  return 1;
}
                       
}
}

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> v = v - (a*tstep); // Like ++v, but with something else +'ing
So increment something then, say
numOfVsCalculated++;