Magic log10()

now,I want to share an easy way about how to get the bits of a number quickly with you

#include<stdio.h>
#include<math.h>

void main()
{
	int bits = 0;
	int num;

	printf("please input an integer number:");

	scanf("%d",&num);

	bits = log10(num)+1;

	printf("The bits you inputed is : %d\n",bits);
}

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