Q. PHP Program to Count the Number of Digits in a Number.

Here you will find an algorithm and program in PHP to count number of digits in a number. First let us understand this.

Explanation : Suppose an input number is given as 12341 then the output will be 5 as there are 5 digits in the given number and digits are 1, 2, 3, 4, 1.

START
step 1 : Input a number from user. Store it in some variable say num.
step 2 : Initialize another variable to store total digits say digit = 0.
step 3 : If num != 0 then increment count by 1 i.e. count++.
step 4 : Divide num by 10 to remove last digit of the given number i.e. num = num / 10.
step 5 : Repeat step 3 to 4 till num != 0.
STOP

PHP Program to Count Number of Digits in a Number

function count_digit($num) 
{ 
	$count = 0; 
	while ($num != 0)  
	{ 
		$num = round($num / 10); 
		++$count; 
	} 
	return $count; 
} 

	$num = 874512369; 
	echo "Number of digits : "
	. count_digit($num); 

Output

Number of digits : 9