Reverse number

A number can be written in reverse order.

For example

12345 = 54321

Logic:

Features of Java - Javatpoint

• Declare a variable to store reverse number and initialize it with 0.
• Multiply the reverse number by 10, add the remainder which comes after dividing the number by 10.

Reversing Number in PHP

Example:

Below progrem shows digits reversal of 23456.

1. <?php  
2. $num = 23456;  
3. $revnum = 0;  
4. while ($num > 1)  
5. {  
6. $rem = $num % 10;  
7. $revnum = ($revnum * 10) + $rem;  
8. $num = ($num / 10);   
9. }  
10. echo "Reverse number of 23456 is: $revnum";  
11. ?>  

Output:

Reversing Number With strrev () in PHP

Example:

Function strrev() can also be used to reverse the digits of 23456.

1. <?php  
2. function reverse($number)  
3. {  
4.    /* writes number into string. */  
5.     $num = (string) $number;  
6.     /* Reverse the string. */  
7.     $revstr = strrev($num);  
8.     /* writes string into int. */  
9.     $reverse = (int) $revstr;   
10.      return $reverse;  
11. }  
12.  echo reverse(23456);  
13. ?>  

Output:/strong>