Added : Basic Core Java and Functional Programming Practice Problem

Author: Shipramargurate

src/com/bridgelabz/basiccore/Distance.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class Distance {
+	
+	//program Distance.java that takes two integer command-line arguments x
+	//and y and prints the Euclidean distance from the point (x, y) to the origin (0, 0). The
+	// formulae to calculate distance = sqrt(x*x + y*y). Use Math.power function
+	
+	public static void main(String[] args) {
+		Scanner sc =new Scanner(System.in); //scanner input
+		System.out.println("Enter the value of x");
+		 int x = sc.nextInt();
+		System.out.println("Enter the value of y");
+		 int y = sc.nextInt();
+		 
+		 double distance = Math.sqrt( x * x + y * y ); //formula for distance
+		 System.out.println("Euclidean distance : " + distance);
+	}
+
+}

src/com/bridgelabz/basiccore/EvenOddNumberr.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class EvenOddNumberr {
+
+	public static void main(String[] args) {
+		//Java Program to Check Whether a Number is Even or Odd
+		Scanner sc = new Scanner(System.in); // scanner iinput
+		System.out.println("Enter the number : ");
+		int number = sc.nextInt(); 
+		 if(number % 2 == 0) // if number is divisble by 2
+		System.out.println("Even number");
+		 else
+			 System.out.println("odd number");
+		
+
+	}
+
+}

src/com/bridgelabz/basiccore/Factor.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class Factor {
+
+	public static void main(String[] args) {
+		// Computes the prime factorization of N using brute force.
+		// calculating the prime factors and printing the result
+		Scanner sc = new Scanner(System.in); // taking user input using scanner class
+		System.out.println("Enter any number : ");
+		int num = sc.nextInt();
+		System.out.println("Prime Factors of " + num + " is :");
+		for (int i = 2; i * i <= num; i++) {
+			if (num % i == 0)
+				num = num / i;
+			System.out.println(i);
+		}
+	}
+}

src/com/bridgelabz/basiccore/FlipCoin.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class FlipCoin {
+
+	public static void main(String[] args) {
+		// Flip Coin and print percentage of Heads and Tails
+
+		// Random random = new Random(); // creating random object
+
+		int count = 0;
+		int tail = 0;
+		int head = 0;
+		Scanner sc = new Scanner(System.in);
+		System.out.println("number of time you want to flips coin is : ");
+		int flip = sc.nextInt();
+		while (count < flip) {
+			double flips = Math.random();// random value will be 0 or 1 in decimal form
+			count++; // increase the count value till while loop iterates
+
+			if (flips <= 0.5) {
+
+				System.out.println("Tail");
+				tail++; // Increase the count value for tail
+
+			} else {
+
+				System.out.println("Head");
+				head++; // increase the count value for head
+			}
+			System.out.println("Number of heads = " + head);
+			System.out.println("Number of tails = " + tail);
+
+			double headpercentage = (double) head / flips * 100; // head percentage
+			double tailpercentage = (double) tail / flips * 100; // tail percentage
+
+			System.out.println("Percentage of head  = " + headpercentage);
+			System.out.println("Percentage of tail = " + tailpercentage);
+
+		}
+	}
+
+}

src/com/bridgelabz/basiccore/HarmonicNumber.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class HarmonicNumber {
+	//the Nth harmonic number: 1/1 + 1/2 + ... + 1/N
+
+	public static void main(String[] args) {
+		Scanner sc = new Scanner(System.in); //scanner input
+		System.out.println("enter the value of n : ");
+		double num = sc.nextDouble();
+		double sum = 0.0; 
+		for(int i = 1; i <= num; i++) {
+			sum += 1.0 / i;
+		}
+		System.out.println("Nth Harmonic Num : " + sum);
+
+	}
+
+}

src/com/bridgelabz/basiccore/LargestNumber.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class LargestNumber {
+	
+	//Java Program to Find the Largest Among Three Numbers
+
+	public static void main(String[] args) {
+		Scanner sc = new Scanner(System.in); //scannerr input 
+		System.out.println("Enter first number : ");
+		int number1 = sc.nextInt(); // storing 1st input
+		System.out.println("Enter second number : ");
+		int number2 = sc.nextInt(); //storing 2nd input
+		System.out.println("Enter third number : ");
+		int number3 = sc.nextInt(); //storingg 3rd  input
+
+		if (number1 > number2 && number1 > number3) // comparing all 3 numbers
+			System.out.println("Largest number is number one i.e :" + number1);
+		else if (number2 > number1 && number2 > number3)
+			System.out.println("Largest number is number two i.e :" + number2);
+		else
+			System.out.println("Largest number is number three i.e :" + number3);
+
+	}
+
+}

src/com/bridgelabz/basiccore/LeapYear.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class LeapYear {
+
+	public static void main(String[] args) {
+		/* leap year program
+	    *A year is a leap year if divisible by 4 except for century year (years ending with 00)
+		*century year is leap year only if it perfectly divisible by 400
+		*/
+
+		System.out.println("Enter any year");
+		Scanner sc = new Scanner(System.in);
+		int year = sc.nextInt();
+		
+		if(year % 400 == 0 && year % 100 == 0 || year % 100 != 0 && year % 4 == 0)
+			System.out.println("Leap Year");
+		else
+			System.out.println("Not a leap year");	
+	}
+
+}

src/com/bridgelabz/basiccore/PowerOfTwo.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class PowerOfTwo {
+
+	public static void main(String[] args) {
+		// This program takes a command-line argument N and prints a table of the
+	    //powers of 2 that are less than or equal to 2^N.
+		Scanner sc = new Scanner(System.in);
+		System.out.println("Enter the value for N : ");
+		int number = sc.nextInt();
+		
+		System.out.println("power of 2^" + number + " is  :"+ (Math.pow(2, number)));
+
+		
+	}
+
+}

src/com/bridgelabz/basiccore/Quadratic.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class Quadratic {
+
+	/*
+	 * find the roots of the equation a*x*x + b*x + c. Since the equation is x*x,
+	 * hence there are 2 roots. The 2 roots of the equation can be found using a
+	 * formula (Note: Take a, b and c as input values) delta = b*b - 4*a*c Root 1 of
+	 * x = (-b + sqrt(delta))/(2*a) Root 2 of x = (-b - sqrt(delta))/(2*a)
+	 */
+	public static void main(String[] args) {
+
+		Scanner sc = new Scanner(System.in); // scanner input
+        //taking value for a , b & c
+		System.out.println("Enter value for a : ");
+		int a = sc.nextInt();
+
+		System.out.println("Enter value for b : ");
+		int b = sc.nextInt();
+
+		System.out.println("Enter value for c : ");
+		int c = sc.nextInt();
+
+		sc.close(); // closing scanner
+
+		int delta = (b * b) - 4 * (a * c); // formula for delta
+		int root1 = (-b + Math.abs(delta)) / (2 * a); // formula to find the root1 value
+		int root2 = (-b - Math.abs(delta)) / (2 * a); // formula to find the root12 value
+
+		System.out.println("Root 1 of X1 :" + root1); // printing the value of root1
+		System.out.println("Root 2 of X2 : " + root2); // printing the value of root1=2
+	}
+}

src/com/bridgelabz/basiccore/QuotientAndRemainder.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class QuotientAndRemainder {
+//Java Program to Compute Quotient and Remainder
+	
+	public static void main(String[] args) {
+		Scanner sc = new Scanner(System.in); //scanner input
+		//taking divident and divisor as user input using scanner class
+		System.out.println("enter divident : ");
+		int divident = sc.nextInt(); // storing dividentt value
+
+		System.out.println("enter divisor : ");
+		int divisor = sc.nextInt(); // storing divisor value
+
+		int quotient = divident / divisor; //  / this give value for quotient
+		int remainder = divident % divisor; // % this  will give  value for reminder
+
+		System.out.println("Quotient is : " + quotient);
+		System.out.println("Remainder is : " + remainder);
+
+	}
+
+}

src/com/bridgelabz/basiccore/SwapingTwoNumber.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class SwapingTwoNumber {
+
+	public static void main(String[] args) {
+		//Java Program to Swap Two Numbers
+		Scanner sc = new Scanner(System.in); //scanner input
+		System.out.println("Enter first number : ");
+		int firstNumber = sc.nextInt();
+		
+		System.out.println("Enter second number : ");
+		int secondNumber = sc.nextInt();
+		
+		int temp = firstNumber;
+		firstNumber = secondNumber;
+		secondNumber = temp;
+		
+		System.out.println("after swapping number will be : ");
+		System.out.println("first number is : " + firstNumber);
+		System.out.println("second number is : " + secondNumber);
+
+	}
+
+}

src/com/bridgelabz/basiccore/VowelConsonant.java

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+package com.bridgelabz.basiccore;
+
+import java.util.Scanner;
+
+public class VowelConsonant {
+
+	public static void main(String[] args) {
+		// Java Program to Check Whether an Alphabet is Vowel or Consonant
+		Scanner sc = new Scanner(System.in); // scanner input 
+		System.out.println("Enter any character : ");
+		char ch = sc.next().charAt(0); // storing char value
+
+		if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' || ch == 'A' || ch == 'E' || ch == 'I'	|| ch == 'O' || ch == 'U')
+			System.out.println("vowel : " + ch);
+		else
+			System.out.println("consonant : " + ch);
+	}
+
+}