Get Highest number from array using for loop

Question

I am trying to get highest number from array. But not getting it. I have to get highest number from the array using for loop.

<?php
$a =array(1, 44, 5, 6, 68, 9);
$res=$a[0];
for($i=0; $i<=count($a); $i++){
 if($res>$a[$i]){
 $res=$a[$i];
 }
}
?>

I have to use for loop as i explained above. Wat is wrong with it?

• Niet the Dark Absol: $res = max($a); not working for you?

Answer 1

This should work for you:

<?php
 $a = array(1, 44, 5, 6, 68, 9);
 $res = 0;
 foreach($a as $v) {
 if($res < $v)
 $res = $v;
 }
 echo $res;
?>

Output:

68

In your example you just did 2 things wrong:

$a = array(1, 44, 5, 6, 68, 9);
$res = $a[0];
for($i = 0; $i <= count($a); $i++) {
 //^ equal is too much gives you an offset!
 if($res > $a[$i]){
 //^ Wrong condition change it to < 
 $res=$a[$i];
 }
}

EDIT:

With a for loop:

$a = array(1, 44, 5, 6, 68, 9);
$res = 0;
for($count = 0; $count < count($a); $count++) {
 if($res < $a[$count])
 $res = $a[$count];
}

• pawan kumar: Sorry i have to use for loop
• Rizier123: @pawankumar updated my answer, but your code is with a for loop and i showed you where to fix it, added now and example how it should look like
• pawan kumar: I need only highest single number (68).
• Rizier123: @pawankumar $res is equal 68 it is that number! print it with echo
• pawan kumar: outside for loop . echo $res; i got answer. Thanks again

Answer 2

What about:

<?php
 $res = max(array(1,44,5,6,68,9));

(docs)

Answer 3

you should only remove the = from $i<=count so it should be

<?php $a =array(1,44,5,6,68,9);
$res=$a[0];
for($i=0;$i<count($a);$i++){
 if($res<$a[$i]){
 $res=$a[$i];
 }
}
?>

the problem is that your loop goes after your arrays index and the condition is reversed.

Answer 4

The max() function will do what you need to do :

$res = max($a);

More details here.

• pawan kumar: sorry i am using for loop
• RCrowt: Sorry. I missed that bit.

Answer 5

Suggest using Ternary Operator

(Condition) ? (True Statement) : (False Statement);

 <?php
 $items = array(1, 44, 5, 6, 68, 9);
 $max = 0;
 foreach($items as $item) {
 $max = ($max < $item)?$item:$max;
 }
 echo $max;
 ?>