package com.java;

import java.util.Random;

public class program {

public static void main(String [] arg){

int trail = 3;

Random rand = new Random();

for(int i=1;i<=trail;i++){

int r=rand.nextInt(0,1);

if(r==0){

System.out.println("head");

}

if(r==1) {

System.out.println("tail");

}

}

System.out.println("-----------leap year----------------");

int year = 2021;

if(year%4==0&&year%100!=0){

System.out.println("leap year");

}

else{

System.out.println("normal year");

}

System.out.println("-------------factors-------------");

int num = 8;

for(int i =1;i<=num;i++){

if(num%i==0){

System.out.println(i + ": is a factor of :"+num);

}

}

System.out.println("---------------quotient and remainder-------------------");

int num1 = 1;

int num2 = 5;

double quotient = num1/num2;

int remainder = num1%num2;

System.out.println("quotint of num1 and num2 is :"+quotient);

System.out.println("Remainder of num1 and num2 is :"+remainder);

System.out.println("--------------------swapping-----------------------------");

int n1 = 6;

int n2 = 7;

System.out.println("before swapping :"+n1+" , "+n2);

int temp = n1;

n1 = n2;

n2 = temp;

System.out.println("After swapping :"+n1+" , "+n2);

System.out.println("-----------even or odd------------------");

int a = 6;

if(a%2==0){

System.out.println("Even");

}

else{

System.out.println("Odd");

}

System.out.println("----------------vowel or consonent--------------------");

String c = "A";

if(c=="a"||c=="e" ||c=="i"||c=="o"||c=="u"||c=="A"||c=="E"||c=="I"||c=="O"||c=="U"){

System.out.println("Vowel");

}

else{

System.out.println("Consonent");

}

System.out.println("----------largest among 3 numbers-----------------");

int p = 1;

int q = 2;

int r = 3;

if(p>q){

System.out.println("p is big :"+p);

}

else if(q>r){

System.out.println("q is big :"+q);

} else if (r>p) {

System.out.println("r is big :"+r);

}

else{

System.out.println("largest number not found among 3 nums");

}

System.out.println("----------power of 2------------------------");

int e = 5;

for(int j=1;j<=e;j++){

System.out.println(j+"\u00b2"+" = "+Math.pow(j,2));

}

System.out.println("-------------harmonic number----------------------------------");

int harmonic = 5;

double sum = 0;

for(int i = 1;i<=harmonic;i++){

sum=sum+(1.0/i);

System.out.println(1+"/"+i+"="+sum);

}

System.out.println("The nth harmonic number is --> "+sum);

}

}