Write a PHP program to print sum of digits
In this program, you will find the Sum of digits program using for loop, while loop, do-while, and HTML form. The Sum of digits is the addition of all individual digits. For example, the sum of digits of 234 is 2+3+4=9
Program to find sum of digit using for loop In PHP
<?php
$number=345;
$sum=0;
for($i=0;$i<=strlen($number);$i++)
{
$sum=$sum+$number%10;
$number/=10;
}
echo"sum of digit 345 is $sum";
?>
output
sum of digit 345 is 12
Program to find sum of digit using while loop In PHP
<?php
$number=123;
$sum=0;
while($number>0)
{
$sum=$sum+$number%10;
$number/=10
}
echo"sum of digit 123 is $sum";
?>
output
sum of digit 123 is 6
Program to find sum of digit using do-while loop In PHP
<?php
$number=123;
$sum=0;
do
{
$sum=$sum+$number%10;
$number/=10;
}
while($number>0);
echo"sum of digit 123 is $sum";
?>
output
sum of digit 123 is 6
Find sum of digit using HTML form In PHP
<!DOCTYPE html>
<html lang="en">
<head>
<title>Write a program to find sum of digit in php</title>
</head>
<body>
<form>
<label for="number">Enter the number:</label> <input type="number" name="SumDigit">
<input type="submit" value="submit" name="click"></br></br>
</form>
</body>
</html>
<?php
if(isset($_GET["click"]))
{
$number=$_GET['SumDigit'];
$num=$number;
$sum=0;
for($i=0;$i<=strlen($number);$i++,$number/=10)
{
$sum=$sum+$number%10;
}
echo"sum of digit $num is $sum";
}
?>
output
Logic to find sum of digits in PHP
- Take the number and store it in a variable
number. - Find the last digits using modulus division
$number%10. - Add the last digit into variable
sum. - repeat step 2 and 3 until the value of
numberbecome 0.