$big_box = array(1,2,3,16,17,18,31,32,33,46,47,48,61,62,63,76,77,78,91,92,93,106,107,108,121,122,123,136,137,138............);
$small_box = array(4,19,34,49,64.............);
I want to generate dynamic numbers array like above example upto 10000.
For Array $big_box Try to something like this.
$j = 0;
for ($i=0; $i <= 1000; $i++) {
if ($i!=0) {
$big_box[] = $i;
$j++;
}
if ($j == 3) {
$j = 1;
$big_box[] = $i+13;
$i =$i+13;
}
}
echo "<pre>";
print_r($big_box);
And array $small_box
$small_box = array();
for($i=0; $i <= 1000; $i++) {
if ($i == 0) {
$small_box[$i] = 4;
}else{
$small_box[$i] = $small_box[$i-1]+15;
}
}
echo "<pre>";
print_r($small_box);
Related
I'm trying to look for a number with maximum divisors in a range of 1 - 10000.
I succeeded, but then I wish to verify if there exist more than two max divisors and print them out. My array is really the problem. How can I clear an array and assign a new integer to it in an if else if statement?
Here is what I have tried:
function countDivisors(){
$input = 10000;
$maxNumOfDiv = -1;
$intWMaxDivs = -1;
$curNumOfDiv = 0;
$arr = array();
for($i=1; $i <= $input; $i++) {
$curNumOfDiv = 0;
for ($j = 1; $j < $i; $j++){
if ($i % $j == 0)
$curNumOfDiv++;
}
if($curNumOfDiv = $maxNumOfDiv){
$arr[] = $i;
$intWMaxDivs = $i;
$maxNumOfDiv = $curNumOfDiv;
} else if($curNumOfDiv > $maxNumOfDiv){
$arr = array();
$arr[] = $intWMaxDivs
$maxNumOfDiv = $curNumOfDiv;
}
}
for ($i; $i < count($arr); $i++){
echo $arr[$i]['intWMaxDivs'];
echo $arr[$i]['maxNumOfDiv'];
}
$div = [];
$maxDivKey = false;
$maxDiv = 0;
for($i = 1; $i <= 10000; $i++) {
for ($j = 1; $j < $i; $j++){
if ($i % $j == 0){
$div[$i][] = $i.'/'.$j.'='.$i/$j;
}
if($j == $i-1){
$count = count($div[$i]);
$div[$i]['count'] = $count;
if($maxDiv < $count){
$maxDiv = $count;
$maxDivKey = $i;
}
}
}
}
echo '<h1>Max divisors:</h1>';
print_r($div[$maxDivKey]);
//print_r($div);
I may be misunderstanding this question a little. If you are looking for a single number with maximum number of dividers, it should be something like this.
<?php
$max_num=10000;
$start_num=1;
$max_divs=-1;
$max_number=-1;
$numbers=array();
$max_divs_arr=array();
for($i=$start_num;$i<=$max_num;$i++)
{
$divs=0;
$div_array=array();
for($j=$start_num;$j<=$i;$j++)
{
if($i%$j==0)
{
$divs++;
$div_array[]=$j;
}
}
if($divs==$max_divs)
$max_divs_arr[$i]=$div_array;
if($divs>$max_divs)
{
$max_divs_arr=array();
$max_divs=$divs;
$max_divs_arr[$i]=$div_array;
}
}
foreach($max_divs_arr as $number=>$divisors)
echo "\nNumber with most divisors is $number\nIt has $max_divs divisors\nThose divisors are:".implode(',',$divisors);
Write a PHP code to print following number pattern:
147
258
369
I am trying like this but its shows me shows below. how to convert column to row pattern.
<?php
$num = "";
for($i=1;$i<=9;$i++) {
$num .= $i;
if($i%3==0){
$num .="<br />";
}
}
echo $num;
?>
please help me
You need to use for loop inside for loop to achieve this. Below is the code
$num = "";
for( $i = 1; $i <= 3; $i++ ) {
for( $j = 0; $j <= 2; $j++) {
$k = $i + ( $j * 3 );
$num .= $k;
}
$num .= "<br />";
}
echo $num;
Here is another way to get this output.
for($i = 1; $i <= 3; $i++) {
$print = $i;
for($j = 1; $j <= 3; $j++) {
echo $print;
$print = $print + 3;
}
echo "<br />";
}
I have created an array dynamically like this way
$names = array();
for ($i = 0; $i < 100; $i++) {
$names[] = $i;
}
then created part
$parts = count($names) / 20;
and created a sub array then loop through the parts
$j = 0;
for ($i = 0; $i < $parts; $i++) {
echo "Part" . $i."<br>";
$newarray = array_slice($names, $j, 20);
for ($i = 0; $i < count($newarray); $i++) {
echo $i;
}
$j = $j + 20;
}
The problem is that this code displays from zero to 19 It doesn't display the other parts
Both the inner and outer loops use the same control variable $i, so just change the inner one...
$j = 0;
for ($i = 0; $i < $parts; $i++) {
echo "Part" . $i."<br>";
$newarray = array_slice($names, $j, 20);
for ($i1 = 0; $i1 < count($newarray); $i1++) {
echo $i1;
}
$j = $j + 20;
}
I'm new to Php and today I came across the rand()-function. I'd like to fill an array with numbers created with this function and then count the number of its duplicates. I already tried it a first time, but somehow I seem to be on the woodway.
<?php
$numbers = array();
for ($i=0; $i < 100; $i++) {
$numbers[$i] = rand(0, 100);
}
//$numbers = array(12,12,12,12);
echo "random numbers generated.<br>";
$arrLength = count($numbers);
$arrWithDoubles = array();
for ($i=0; $i < $arrLength; $i++) {
//echo "start looping for i: ".$i."! numbers['i'] has the content".$numbers[$i].".<br>";
for ($x=$i; $x < $arrLength; $x++) {
//echo "looped for x: ".$x."! numbers['x'] has the content".$numbers[$x].".<br>";
if($numbers[$i] == $numbers[$x]) {
if($i != $x) {
//echo "pushed to 'arrWithDoubles'.<br>";
array_push($arrWithDoubles, $numbers[$x]);
}
}
}
}
echo "numbers of doubles: ".count($arrWithDoubles)."<br>";
echo "list of numbers which were double:<br>";
for ($i=0; $i < count($arrWithDoubles); $i++) {
echo $arrWithDoubles[$i];
echo "<br>";
}
?>
The array_unique() function removes duplicates from an array, then just add a bit of math.
<?php
$numberOfDuplicates = count($orginalArray) - (count($orginalArray) - count(array_unique($originalArray)));
?>
$origin = array(2,4,5,4,6,2);
$count_origin = count($origin);
$unique = array_unique($origin);
$count_unique = count($unique);
$duplicates = $count_origin - $count_unique;
echo $duplicates;
$count = array();
foreach ($srcRandom as $sr) {
if (!array_key_exists ($sr, $count) ) {
$count[$sr] = 1;
continue;
}
$count[$sr]++;
}
var_dump ($count);
Thanks for all your input. With that I came to the following solution which fits my demand the best:
<?php
function countValueInArray($value, $array) {
$count = 0;
for ($i=0; $i < count($array); $i++) {
if($value == $array[$i]) {
$count++;
}
}
return $count;
}
$numbers = array();
for ($i=0; $i < 100; $i++) {
$numbers[$i] = rand(0, 100);
}
$duplicates = array();
for ($x=0; $x < count($numbers); $x++) {
$number = countValueInArray($numbers[$x], $numbers);
if ($number > 1) {
array_push($duplicates, $numbers[$x]);
}
}
$duplicatesList = array_values(array_unique($duplicates));
echo "number of duplicates: ".count($duplicatesList);
echo "<br>these are: <br>";
print_r($duplicatesList);
?>
Thanks a lot for your help!
i am facing a problem
can some one suggest me
for ($i = 1; $i <= 2; $i++) {
$r2 = 0;
for ($t = 1; $t <= 2; $t++) {
echo $r2;
$r2++
}
}
output is 0101;
can i get output 0123 ??? please
if
for ($i = 1; $i <= 3; $i++) {
$r2 = 0;
for ($t = 1; $t <= 3; $t++) {
echo $r2;
$r2++
}
}
output is 010101;
can output 012345678 ??? please
and if
for ($i = 1; $i <= 4; $i++) {
$r2 = 0;
for ($t = 1; $t <= 4; $t++) {
echo $r2;
$r2++
}
}
output is 01010101;
can output 0123456789101112131415 ??? please
i think you understand
thanks
In all of these cases you are initializing $r2=0; in the inner loop. It should be outside the loop.
$r2=0;
for($i=1;$i<=2;$i++){
for($t=1;$t<=2;$t++){
echo $r2;
$r2++
}
}
This would produce "1234".
why are you using two nested for loops ?
why not just use one:
for ($i=0; $i<=15; $i++) echo $i . " ";
Try this:
$r2 = 10;
for($t = 0; $t <= $r2; $t++){
echo $r2;
}
Oh wait.. I get it now, why you have the two nested loops, you want to essentially raise a number to the power of 2 in order to control the number of values output. In that case, what you want is simply this:
// this is the variable you need to change to affect the number of values outputed
$n = 2;
// Square $n
$m = $n * $n;
// Loop $m times
for ($i = 0; $i < $m; $i++) {
echo $i;
}