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added maths file

Author: nsgowebjavaprog

Maths/Count_Number.class

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+package Maths;
+// eg : 1234 o/p=4
+// eg 2: 4543453 o/p=7
+// count no.of digits
+
+class Count_Number {
+        public static void main(String[] args) {
+            int num = 3423;
+            int count = 0;
+            while(num>0){
+                num = num/10;
+                count +=1;
+            }
+         
+        }
+    
+}

Maths/Count_Number.java

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+package Maths;
+
+public class Factorial {
+    public static void main(String[] args) {
+
+        int n = 5;
+       int fact = 1;
+        for (int i = 1; i <= n ; i++) {
+            fact = fact * i;
+        }
+        System.out.println(fact);
+    }
+}

Maths/Factorial.class

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+package Maths;
+// A, B some value
+// A != B
+// if A>B
+// A=A-B
+// if B>A
+// B=B-A
+public class GCD_or_HCF_Number {
+    public static void main(String[] args) {
+        
+        int a = 98, b = 56;
+        while (a != b) {
+            if (a == 0) {
+                System.out.println("GCD" + b);
+                break;
+            }
+            if (b == 0) {
+                System.out.println("GCD" + a);
+                break;
+            }
+            if (a > b)
+                a = a - b;
+            if (b > a)
+                b = b - a;
+        }
+        if (a == b) {
+            System.out.println("GCD: " + a);  // we print a (or) b becz having same value
+        }
+    }
+}

Maths/Factorial.java

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+package Maths;
+
+public class Palindrom {
+    public static void main(String[] args) {
+        String s = "asdgfdsa";
+        int i=0, j=s.length()-1;
+        while (i<j){
+            if(s.charAt(i) != s.charAt(j)){
+                System.out.println("Not Palindrome");
+                System.exit(0);
+            }
+            i++;
+            j--;
+        }
+        System.out.println("Palindrome");
+    }
+}

Maths/Fib_series.java

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+package Maths;
+
+public class Power_of_2 {
+    public static void main(String[] args) {
+        boolean a = false;
+        int num = 32,power = 0,temp=0;
+        while (temp < num){
+            temp = (int)(Math.pow(2,power));
+            power++;
+            if(temp == num){
+                a = true;
+            }
+        }
+        if(a){
+            System.out.println("True");
+        }else{
+            System.out.println("False");
+        }
+    }
+}

Maths/GCD_or_HCF_Number.java

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+package Maths;
+
+public class Prime_Number {
+    public static void main(String[] args) {
+        int num = 23;
+        boolean prime = true;
+        for (int i = 2; i <num ; i++) {
+            if(num%i==0){
+                prime = false;
+                break;
+            }
+        }
+        System.out.println(prime);
+    }
+}