float infinative example

package datatypes;

public class FloatINF {

public static void main(String[] args) {
    float pi = 1.0f,ni=-1.0f,nan;
    float a=0,b=Float.NaN;
    float pz,nz;
    int i;
    pi = pi/a;
    ni = ni/a;
    System.out.println(" NaN + some no = " + (b + 10.0));
    System.out.println(" + inf + some no = " + (pi + 10.0));
    System.out.println(" +inf - some no= "+(pi-1000.101e30));
    System.out.println(" -inf - some no= "+(ni-1000.101e30));
    System.out.println(" -inf + some no= "+(ni-1000.101e30));
    System.out.println(" + inf +  - inf = " + (pi + ni));
    System.out.println(" + inf -  - inf = " + (pi - ni));
}

}
output:
NaN + some no = NaN
+ inf + some no = Infinity
+ inf - some no = Infinity
- inf - some no = -Infinity
- inf + some no = -Infinity
+ inf +  - inf = NaN
+ inf -  - inf = Infinity