如何在foreach / for循环中每次添加超过1个？

Question

How do you add more than 1 each time in a foreach/for loop?

I know the basic +1 is like this:

for ($i=1;$i<$nc;$i++){

 echo $i;

}

but I need to add another element which goes up by 5 each time also

    for ($i=1;$i<$nc;$i++){

       // what ever maths to make $plus5 go up by 5 each time

       echo $i . ' - ' . $plus5;

}

so the result would be:

1 - 5
2 - 10
3 - 15
4 - 20

Answer 1

 for ($i=1;$i<$nc;$i++){

       $b = $i*5;

       echo $i . ' - ' . $b . '<br/>';           

}