Sum of Digits

To find sum of digits of a number just add all the digits

For example,

    14597 = 1 + 4 + 5 + 9 + 7  
    14597 = 26 
    

Logic:

• Take the number.
• Divide the number by 10.
• Add the remainder to a variable.
• Repeat the process until remainder is 0.

Example:

Given program shows the sum of digits of 14597.

Example

Copy

                    
    <?php  
    $num = 14597;  
    $sum=0; $rem=0;  
    for ($i =0; $i<=strlen($num);$i++)  
    {  
    $rem=$num%10;  
    $sum = $sum + $rem;  
    $num=$num/10;  
    }  
    echo "Sum of digits 14597 is $sum";        
   ?>  
    

Output