How to skip a step in a C++ FOR loop?

Question

I wrote

for (int n=0; n<10; n++ )
{
...
}


Is there an elegant way of skipping n= 6, without
writing two loops ?

PS.

I don't want to do this

for(n=0; n < 10; n++ )
{
if (n != 6 )
{
...
}
}

because it executed if() function 10 times and creates slow code.

Answer 1

I wouldn't worry about an extra if eating up any extra CPU's. Believe me, the difference would be negligible...

If you really want to speed up your code, do this:
int x = 0;
for ( ; x < 6; x++ ) {
doWork();
}

x++;
for ( ; x < 10; x++ ) {
doWork();
}

that's about as fast as it gets. It's more code bloat, but it does prevent the extra if().

Answer 2

Did your instructor warn you about using magic number?

you have 2 magic numbers in your code: 10 and 6. There is always a way to refine your code better.

Answer 3

You could try this
if (n == 6)
continue;
It will continue the loop with n = 7

Answer 4

if (n=6) n ++; increment the value of n then and there.

Answer 5

while(int n=0; n<10; n++)

{
...
}