## 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.

## Algorithm to count the number of digits in a given number

```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
```