For Loop

[Anon]

Hey, I am having probs with this.

I am using this code

echo "<input type='hidden' name='num' value='$nums'>";
echo "<input type='submit' value=' Next Step '>";
echo "</td></tr>";
echo "</table></form>";

}

if ($action=="step2") {

echo "$num";

for ($nums=1; $nums=$num; $nums++) {

    echo "$nums";

}

}

to transfer data fron one step to another, but when I click to send the data, all it does is load, and when I take away teh for loop it works, but i need the for loop there. can any one help.

[Anon]

Watch for the difference between = and ==, it had cost me lots of time to find such bugs based on this!
With this, it should work:

for ($nums=1; $nums==$num; $nums++) {

Best regards,

King Louie

[Anon]

Err.. heh well there you go 😃

Now for another question. How would I go about adding two different numbers together using a for loop.. example:

for loop 1: number comes out to be 1 from other date using array $num[0]

for loop 2: number comes out to be 5 from other date using array $num[1]

any ideas?

[terje-s]

Don't quite understand the question.

However, the for loop works like this:

for (initialize; condition; action) { .. }

initialize is evaluated (executed) only once; at the beginning of the loop. The usual thing to do here, is to assign a value to a variable.

If condition returns false, the loop ends. The normal thing to do here is a comparison with a criteria that is modified in action.

Action usually increments (or decrements) a variable. The action should a some point make the condition false.

for ($x = 0; $x < 10; $x++) {
print $x;
}

• initialize: set $x to 0 (Only run once)
• condition: is $x < 10? Yes, it's 0, run
  (print $x, or whatever is in the brackets)
• action: increment $x by 1

(next)
- condition: is $x < 10? Yes, it's 1, run
print $x or whatever
- action: increment $x by 1

.... 8 more ....

• condition: is $x < 10? No, it's 10. Break loop.

(Note that < is different from <= (latter meaning less or equal))

Note that the initial error, one '=' instead of two, caused condition to be false at first run. = is an assignment operator, and == is a comparison operator. You assigned a value instead of comparing it, and there is no return value for an assignment (wich qualifies as 'false').

Hope that cleared up something 🙂

[Anon]

Take a look at this code, it wokrs fine.

---

.. code above ..

$numsx = ($nums - 1);
echo "<input type='hidden' name='num' value='$numsx'>";
echo "<input type='submit' value=' Next Step '>";
echo "</form>";
}

if ($action=="step3") {

for ($nums=1; $nums<=$num; $nums++) {

   echo "$str[$nums]";

}

}

---

$str[$nums] each equal a different number in some cases, so like $str[1]=5 $str[2]=1...

what I want to know how to do is add both of them together while still using the for loop. So I get a outcome of 6.

does that make sence?