intlen in c++

#include <iostream>
using namespace std;

int intlen(int num) {
    int length = 0;
    while (num != 0) {
        num /= 10;
        length++;
    }
    return length;
}

int main() {
    int number = 3579;
    int length = intlen(number);
    cout << "The length of " << number << " is: " << length << endl;
    return 0;
}

1. Include Libraries: The code includes the iostream library to enable input and output operations in C++.

2. Namespace: The using namespace std; line allows using elements from the standard C++ library without explicitly qualifying them with std::.

3. Function intlen: Defines a function named intlen that takes an integer num as a parameter and returns an integer value. This function is meant to calculate the length of the integer by counting the number of digits it contains.

4. Variable Declaration: Inside intlen, an integer variable length is declared and initialized to 0. This variable will store the length of the integer.

5. While Loop: A while loop is used to iterate until num becomes 0. Inside the loop, num is divided by 10, effectively removing the last digit, and length is incremented by 1.

6. Return Length: After the loop, the function returns the calculated length of the integer.

7. Main Function: The main function begins the program's execution.

8. Variable Initialization: An integer variable number is declared and initialized to 3579.

9. Calculating Length: The intlen function is called with number as an argument, and the returned value is stored in the length variable.

10. Output: The program outputs the original number and its length using cout. The endl is used to move the output to the next line after displaying the information.

11. Return 0: Finally, the main function returns 0, indicating successful program execution to the operating system.