C Programming to calculate perimeter of rectangle

/*to calculate perimeter of rectangle*/
#include<stdio.h>
#include<stdlib.h>
int main()
{
    float l,b,p;
    printf("Enter length of rectangle: ");
    scanf("%f",&l);
    printf("Enter breadth of rectangle: ");
    scanf("%f",&b);
    p=2*(l+b);
    printf("The perimeter of rectangle=%f",p);
    system("pause");
    return 0;
}