Check postive negative

/* C programme to check if a number is positive or not */
#include<stdio.h>
int main(void)
{
    float a;
    printf("enter a number to check whether it is positive or not\n");
    scanf("%f",&a);
    if(a>0)
    {
        printf("positive\n");
    }
    else if(a<0)
    {
        printf("negative\n");
    }
    else
    {
        printf("zero\n");
    }
    return 0;
}