Question

How to calculate the number of digits using log in C++

Answer 1

#include <iostream>       
#include <cmath>

int count_digit(int number) {
   return int(log10(number) + 1);            
}

int main() {
   std::cout << "Number of digits in 579014: " << count_digit(579014) << "\n";
}    


        
/*
run:
        
Number of digits in 579014: 6
     
*/

 

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