example to calculate income tax

/*to calculate income tax*/
#include<stdio.h>

int main(){
float tax=0, income;
printf("enter your income\n");
scanf("%f",&income);

if(income>=250000 && income<=500000){
    tax=tax+0.05*(income-250000);
}
if(income<=500000){
    tax=tax+0.20*(income-500000);
}
printf("your net income tax to be paid is %f\n",tax);
return 0;
}