updated README.md

Author: chiragobhan

README.md

@@ -1 +1,58 @@
-# php-arrays
+# PHP Arrays
+Sort an array of temperatures in ascending order and retrieve 5 coolest and 5 warmest temperatures.
+  
+### Initialize array
+`$array = array(68, 70, 72, 58, 60, 79, 82, 73, 75, 77, 73, 58, 63, 79, 78, 68, 72, 73, 80, 79, 68, 72, 75, 77, 73, 78, 82, 85, 89, 83);`  
+  
+### Print array
+`print_r($array);`  
+  
+#### Output:  
+![printArray](https://user-images.githubusercontent.com/32812640/82562015-0a62d080-9b92-11ea-8490-95c4582b636c.PNG)  
+  
+### Sort array in ascending order
+<pre>
+for ($j = 0; $j < count($array); $j++) {
+  for ($i = 0; $i < count($array) - 1; $i++) {
+    if ($array[$i] > $array[$i + 1]) {
+      $temp = $array[$i + 1];
+      $array[$i + 1] = $array[$i];
+      $array[$i] = $temp;
+    }
+  }
+} 
+</pre>  
+  
+### Average of all tempratures
+<pre>
+$total = 0;
+foreach ($array as $key => $value) {
+  $total = $total + $value;
+}
+echo ($total / count($array)) . ' is the average of the temperatures.';
+</pre>  
+  
+#### Output:  
+![average](https://user-images.githubusercontent.com/32812640/82561574-3d589480-9b91-11ea-9c6c-ee15a22c8802.PNG)  
+  
+### Five coolest tempratures
+<pre>
+$max = count($array);  
+for ($i = $max - 5; $i < $max; $i++) {  
+  echo "$array[$i]&#8457; temperature";  
+}
+</pre>
+  
+#### Output:  
+![coolest](https://user-images.githubusercontent.com/32812640/82561782-958f9680-9b91-11ea-8389-11f4e350b07e.PNG)  
+
+  
+### Five warmest tempratures
+<pre>
+for ($i = 0; $i < 5; $i++) {  
+  echo "$array[$i]&#8457; temperature";  
+}
+</pre>
+  
+#### Output:  
+![warmest](https://user-images.githubusercontent.com/32812640/82561725-798bf500-9b91-11ea-8094-924e9d476215.PNG)