[Program to count digits in an integer](https://www.geeksforgeeks.org/program-count-digits-integer-3-different-methods) More...

#include <cassert>
#include <iostream>

Include dependency graph for finding_number_of_digits_in_a_number.cpp:

Functions
uint64_t	finding_number_of_digits_in_a_number (uint64_t n)
	for IO operations More...

static void	test ()
	Self-test implementations. More...

int	main ()
	Main function. More...

Detailed Description

[Program to count digits in an integer](https://www.geeksforgeeks.org/program-count-digits-integer-3-different-methods)

Author: aminos 🇮🇳

It is a very basic math of finding number of digits in a given number i.e, we can use it by inputting values whether it can be a positive/negative value, let's say: an integer. There is also a second method: by using "K = floor(log10(N) + 1)", but it's only applicable for numbers (not integers). For more details, refer to the Algorithms-Explanation repository.

Function Documentation

◆ finding_number_of_digits_in_a_number()

uint64_t finding_number_of_digits_in_a_number ( uint64_t n )

for IO operations

for assert

The main function that checks the number of digits in a number.

Parameters

n	the number to check its digits

Returns: the digits count

< the variable used for the digits count

                                                          {
    uint64_t count = 0;  ///< the variable used for the digits count
 
    // iterate until `n` becomes 0
    // remove last digit from `n` in each iteration
    // increase `count` by 1 in each iteration
    while (n != 0) {
        // we can also use `n = n / 10`
        n /= 10;
        // each time the loop is running, `count` will be incremented by 1.
        ++count;
    }
 
    return count;
}

◆ main()

int main ( void )

Main function.

Returns: 0 on exit

           {
    test();  // run self-test implementations
    return 0;
}

Here is the call graph for this function:

◆ test()

static void test ( )

static

Self-test implementations.

Returns: void