How do i do partial sums?

[tpdinh]

I have to evaluate the sum in the for-loop. How do i do that?
Also, I need to print the partial sums using %e. Please help!

[D_C]

int i;
int sum = 0;
for(i = FIRST_VALUE; i < STOP_VALUE; i++)
{
  sum += f(i);
}

[tpdinh]

hi,
what does the f means?
Please reply.
thanks

int i;
int sum = 0;
for(i = FIRST_VALUE; i < STOP_VALUE; i++)
{
  sum += f(i);
}

[tpdinh]

Sorry to bother you but I have a program that i've been working for more than two hours. and still couldn't finish. The problem states:
In the forloop evaluate the sum (between any real number that you enter on scanf and any large number such as n_end that you input on scanf also). in addition, print the partial sums using %16.8e for n=10,20,30,...
Can you please help!

int i;
int sum = 0;
for(i = FIRST_VALUE; i < STOP_VALUE; i++)
{
  sum += f(i);
}