Help me in solving PPSCPP87 problem

help
,
1

My issue

please help me understand the problem

My code

#include <iostream>
using namespace std;

int main() {
    int num, count = 0;
    cin >> num;

    while (num != 0) {
        // Update your code below this line
        num = num/10;
        count ++;
        
    }
    cout << count;
    return 0;
}

Learning course: Complete C++ course
Problem Link: Coding problem - 3 Practice Problem in Complete C++ course - CodeChef

2

So friend

We are trying to count the number of digits of a number.

For example

let the number be

609

every time we divide a number by 10 it gets rid of the last integer

you may think

(609 / 10) is 60.9

but we are considering integer data type.
So, the default division is floor division.

you can find this by running this code

int a = 609;
int b = 609/10;
cout << b << endl;

Now to count the number of digits

we see how many time the number can withstand division by 10.

while being greater than zero.

Lets see in action

int count=0;
while(n>0){     //609 is greater than 0
  n = n/10;    // n now holds 60
   count++; // count now holds 1 

}

again …

while(n>0){     //60 is greater than 0
   n = n/10;    // n now holds 6
    count++;  // count now holds 2

}

again …

while(n>0){     //6 is greater than 0
   n = n/10;    // n now holds 0
    count++;  // count now holds 3

}

now n becomes 0. so, we break out of the loop.

As you can see,

count variable now holds 3 that is the number of digits in 609.

Hoping I could be of help. Have a great day.