More than 3 variables on the single loop.

Question

Hello Guys,

Need some help about doing 3 variables on the single loop doing "for". I found this code and it is very useful for dual variable.

for ($i=1, $k=0; $i<=5; $i++, $k++) {
     echo "Num A: " . $i . "Num B: " . $k . "\n";
}

OUTPUT:
Num A: 1 Num B: 0
Num A: 2 Num B: 1
Num A: 3 Num B: 2
Num A: 4 Num B: 3
Num A: 5 Num B: 4

But how about 3 variable or more. I tried add another variable inside of parenthesis but I'm having an error

    for ($w=1, $i=1, $k=0; $i<=5; $w<=5; $i++, $k++, $w++)

and I tried also to separate it: just an example

  for ($i=1, $k=0; $i<=5; $i++, $k++) {
       for ($w=1, $k=0; $i<=5; $i++, $k++) {

       }
}

but won't work and I think, what I'm doing is not the best practices... Am I?

My main goal is, the OUTPUT will be look like this:

Num A: 1 
    Num C: 1 Num B: 0
    Num C: 2 Num B: 1
    Num C: 3 Num B: 2
Num A: 2
    Num C: 1 Num B: 3
    Num C: 2 Num B: 4
    Num C: 3 Num B: 5    
Num A: 3
    Num C: 1 Num B: 3
    Num C: 2 Num B: 4
    Num C: 3 Num B: 5   
Num A: 4
    Num C: 1 Num B: 6
    Num C: 2 Num B: 7
    Num C: 3 Num B: 8
Num A: 5
    Num C: 1 Num B: 9
    Num C: 2 Num B: 10
    Num C: 3 Num B: 11

Can you give me an advice what should I do to solve this problem?

Thanks and God Bless...

Answer 1 · 2015-05-24T21:57:15Z

May 24, 2015 9:57pm

Hi there,

I am not entirely sure if I understand what you are actually trying to do here, but I do think you might be complicating things a bit too much. Could this, slightly simpler, way of doing it work?

$c = 0;

for ($a=1; $a<=5; $a++) {
    echo "Num A" . $a . "\n";

    for($b=1; $b<=3; $b++) {
        echo "Num B: " . $b . " \t Num C: " . $c . " \n";
        $c++;
    }
}

This way, Num C will continuously increase by one while Num B will be reset to 1 for every time Num A is looped over. Does this make sense?

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Dennis Castillo

Dennis Castillo

More than 3 variables on the single loop.

1 Answer

Eirik Anfinsen

Eirik Anfinsen

Dennis Castillo

Dennis Castillo