Question

I’m trying to make a FOR loop in c with specific i values for example i=2,6,8,12,16,20,22,26,34.. I just don’t know how to specify increments as they are not equal. This code is not good for me.

for (i=2,i<=30,i++) {

}

Maybe with specified array of values in i and then run for loop with reference to that array?

Any help?

Answer 1

Your for-loop syntax needs to be fixed.

The first option is to use a custom function:

 for (i=2; i <= 30; i = foo(i)) { ... }

where foo is a function which takes the current value of i and returns the next value. You will need to come up with a proper definition of foo yourself.

The other approach can be to put all these values in an array and use the array as indices:

 int indices[ MAX_INDICES ] = { 2, 6, ... };
 for (size_t j = 0; j < MAX_INDICES; ++j) { 
      /* instead of using 'j' use indices[ j ] now on */
 }