Mencari deret Bilangan Prima

public class prima {

public static void main(String[] args) {

int i =2;
 
  while (i<=50){
boolean prima=true;

for (int j = 2; j<i; j++) {
                              if(i%j == 0) {
                                    prima = false;
break;
}
}
if (prima) {
System.out.print(i + (" "));
}
i++;
}
}
        }

Mencari Bilangan Kelipatan Tiga ( FOR )

public class BilanganKelipatan3_for {

public static void main(String[] args) {


       /*Deklarasi Variable*/
          int i;

               /*perhitungan*/
                    for (i=1;i<=50;i+=3)

                        /*hasil*/
                         System.out.print(i+ " ");
 }
}

Mencari Bilangan Genap ( FOR )

public class BilanganGenap_for {


public static void main(String[] args) {
// TODO Auto-generated method stub

         /*deklarasi Variable*/
int i;

                 /*perhitungan*/
                       for (i=2;i<=50;i+=2)

                           /*hasil*/
                            System.out.print(i + " ");
}
}

Mencari Bilangan Ganjil

public class BilanganGanjil {

public static void main(String[] args) {
// TODO Auto-generated method stub
/* Deklarasi Variable */
int angka,angka1,angka2,angka3,angka4,angka5,angka6,angka7,angka8,angka9,angka10;
int angka11,angka12,angka13,angka14,angka15,angka16,angka17,angka18,angka19,angka20;
int angka21,angka22,angka23,angka24,angka25;



/*Perhitungan Ganjil*/
angka=1;
angka1=angka;
angka2=angka+2;
angka3=angka2+2;
angka4=angka3+2;
angka5=angka4+2;
angka6=angka5+2;
angka7=angka6+2;
angka8=angka7+2;
angka9=angka8+2;
angka10=angka9+2;
angka11=angka10+2;
angka12=angka11+2;
angka13=angka12+2;
angka14=angka13+2;
angka15=angka14+2;
angka16=angka15+2;
angka17=angka16+2;
angka18=angka17+2;
angka19=angka18+2;
angka20=angka19+2;
angka21=angka20+2;
angka22=angka21+2;
angka23=angka22+2;
angka24=angka23+2;
angka25=angka24+2;


/*hasil*/
System.out.print("");
System.out.print(angka1);
System.out.print(" ");
System.out.print(angka2);
System.out.print(" ");
System.out.print(angka3);
System.out.print(" ");
System.out.print(angka4);
System.out.print(" ");
System.out.print(angka5);
System.out.print(" ");
System.out.print(angka6);
System.out.print(" ");
System.out.print(angka7);
System.out.print(" ");
System.out.print(angka8);
System.out.print(" ");
System.out.print(angka9);
System.out.print(" ");
System.out.println(angka10);
System.out.print("");
System.out.print(angka11);
System.out.print(" ");
System.out.print(angka12);
System.out.print(" ");
System.out.print(angka13);
System.out.print(" ");
System.out.print(angka14);
System.out.print(" ");
System.out.print(angka15);
System.out.print(" ");
System.out.print(angka16);
System.out.print(" ");
System.out.print(angka17);
System.out.print(" ");
System.out.print(angka18);
System.out.print(" ");
System.out.print(angka19);
System.out.print(" ");
System.out.println(angka20);
System.out.print("");
System.out.print(angka21);
System.out.print(" ");
System.out.print(angka22);
System.out.print(" ");
System.out.print(angka23);
System.out.print(" ");
System.out.print(angka24);
System.out.print(" ");
System.out.print(angka25);
}
}

Mencari Bilangan Ganjil ( FOR )

public class BilanganGanjil_for {


public static void main(String[] args) {
// TODO Auto-generated method stub

/* Deklarasi Variable */
int i;

/*Perhitungan*/
for (i=1;i<=50;i+=2)

/*hasil*/
System.out.print(i + " ");
}
}