[SOLVED] Loop

[ballhogjoni]

How can I make a loop for this formula?

 

P (1 + r/365)³⁶⁵

[MmmVomit]

Not enough information.

 

It looks like you're trying to calculate interest on something.  What exactly are you trying to do?

[d.shankar]

I hope this could help !

 

<?php

#P(1 + r/365)365

$P=10; #change the P value here
$r=5; #change the r value here	

$div_res=$r/365;
$sum_res=$div_res+1;

$result=pow($sum_res,365);

$finalresult=$result*$P;

echo $finalresult;

?>

[ballhogjoni]

Thank you for the replies. Yes I am trying to calculate daily compunding interest.

[cooldude832]

Since you are looking for a sigma of something why not do a 
[code
<?php
for($i =1; $i <=$num_days; $i++){
$value[$i] = //Some math stuff;
}
$sum = array_sum($value);
?>

 

Or you can view a a day to day of it etc etc,  you might want to might need to try this below however, since you will need compounding interest

<?php
for($i =1; $i <=$num_days; $i++){
if($i >1){
$j = $i-1;
$value[$i] = //Some math stuff using the recursive value;
}
else{
$value[$i] = //Some math based ont he IV
}
}
?>

 

Like so,

[d.shankar]

Did the code help ?

[ballhogjoni]

Thank you again. Yes, d.shankar, the code helped.

[ballhogjoni]

<?php
for($i =1; $i <=$num_days; $i++){
if($i >1){
$j = $i-1;
$value[$i] = //Some math stuff using the recursive value;
}
else{
$value[$i] = //Some math based ont he IV
}
}
?>

 

Whats the recursive value?

[cooldude832]

$value[$j]

$value is the daily balance after n days (n is what the value is in it)  so you are compounding daily so today's balance = $value[$today-1]*$rate+$value[$today-1]  which is that recursive step i showed. 

 

[ballhogjoni]

if I had 365 days and I wanted to have the script print each day, 1,2,3,4...

 

what type of loop would that be? I have used a foreach() & for() and they didn't work.

 

My code

<?php
$y=5;
$days = ($y*365);
$resultDay = array($days);

for($i=1; $i<=$days; $i++){
$years=$days-1;
}
echo $years;
?>

 

Outputs:

 

1824

 

Shouldn't it output 1,2,3,4,5,.....1825?

[BlueSkyIS]

you only echo once. you may want to include the echo in the loop so it happens more than once.

[ballhogjoni]

Ok great, thanks. The problem now is that it is just repeating 182418241824...

 

It should be saying

 

1

2

3

4

5

6

7

etc

 

Maybe I am not explaining it well enough...this is what I want the code to do:

 

foreach() day run this code...if there are 365 days this code should run 365 times and I want it to output something 365 times, I.E.

 

foreach($day as $dy) {

//some code

echo 'somthing';

}

 

Output should look something like this:

 

1

2

3

4

5

6

etc

[BlueSkyIS]

for($i=1; $i<=$days; $i++){
echo "$i<BR>";
}

 

I assume this is for a web page, so the line break is <BR>.

[rarebit]

Sorry no intermediaries on this one... (play with n for that!)

/*
Daily Compounded Interest
V = D(1 + r/365)365n
D is the amount deposited, r is the interest rate,
n is the number of years, and V is the final amount.
*/
function dci($d, $r, $n)
{
return $d*( pow((1+$r/365), 365*$n) );
}
echo "dci: ".dci(10, 2, 3);

ref: http://www.math.umd.edu/~rll/cgi-bin/finance.cgi