Print a message if negative number is entered Program in C

/*Program to print a message if negative number is entered */
#include<stdio.h>
int main(void)
{
	int num;
	printf("Enter a number : ");
	scanf("%d",&num);
	if(num<0)
	{
		printf("Number entered is negative\n");
		num=-num;  
	}
	printf("Value of num is : %d\n", num);
	return 0;
}