C

find length of int number in c

int nDigits = floor(log10(abs(the_integer))) + 1;

finding length of integer in c

int get_int_len (int value){
  int l=1;
  while(value>9){ l++; value/=10; }
  return l;
}

size of int in c

#include <limits.h>
#include <stdio.h>
 
int main()
{
    printf("minimum int value = %d
"
           "maximum int value = %d
"
           "size of int in bytes = %zu
"
           "size of int in bits = %zu",
           INT_MIN, INT_MAX, sizeof(int),
           sizeof(int) * CHAR_BIT);
}