Static Methods - 36

src/HarmonicNumber.java

@@ -0,0 +1,14 @@
+public class HarmonicNumber {
+
+    public static double har(int N) {
+        double sum = 0.0;
+        for (int i = 0; i <= N; i++) {
+            sum += 1.0 / i;
+        }
+        return sum;
+    }
+
+    public static void main(String[] args) {
+        System.out.println("Harmonic of given number is: "+har(15));
+    }
+}

src/Hypotenuse.java

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+public class Hypotenuse {
+    public static double hypotenuse(double a, double b) {
+        return Math.sqrt(a * a + b * b);
+    }
+
+    public static void main(String[] args) {
+        System.out.println("Hypotenuse of given triangle is "+ hypotenuse(6,8));
+    }
+}

src/PrimeTest.java

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+public class PrimeTest {
+    public static boolean isPrime(int N) {
+        if (N < 2) return false;
+        for (int i = 2; i * i <= N; i++) {
+            if (N % i == 0) return false;
+        }
+        return true;
+    }
+
+    public static void main(String[] args) {
+        System.out.println("Is Given Number Is Prime: " + isPrime(511));
+    }
+}

src/SquareRoot.java

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+public class SquareRoot {
+
+    public static double sqrt(double c) {
+        if (c <= 0) return Double.NaN;
+        double err = 1e-15;
+        double t = c;
+        while (Math.abs(t - c / t) > err * t) {
+            t = (c / t + t) / 2.0;
+        }
+        return t;
+    }
+
+    public static void main(String[] args) {
+        System.out.println("Square root of given number is: "+ sqrt(144));
+    }
+}

src/StaticExamples.java

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+import java.util.Scanner;
+
+public class StaticExamples {
+    public static int abs(int x) {
+        if (x < 0) return -x;
+        else return x;
+    }
+
+    public static double abs(double y) {
+        if (y < 0.0) return -y;
+        else return y;
+    }
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        System.out.println("Enter a Number(INT): ");
+        int x = sc.nextInt();
+
+        int resultX = abs(x);
+        System.out.println("The absolute value of " + x + " is " + resultX);
+
+        System.out.println("Enter a Number(DOUBLE): ");
+        double y = sc.nextDouble();
+
+        double resultY = abs(y);
+        System.out.println("The absolute value of " + y + " is " + resultY);
+    }
+}