Added GitHub CheatSheet, ML Roadmap and OOPS Concept

ML-Roadmap/README.md

@@ -0,0 +1,2 @@
+### ML Roadmap
+This folder contains the Machine Learning Roadmap with all the ML Algorithms.

OOPS_Concept/DAY-1/ASCII.java

@@ -0,0 +1,17 @@
+
+import java.util.*;
+
+public class ASCII {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.print("Enter a character: ");
+        char ch = scanner.next().charAt(0);
+        System.out.println("ASCII value of '" + ch + "' is: " + (int) ch);
+
+        System.out.println("ASCII values of digits 0-9:");
+        scanner.close();
+    }
+}
+
+

OOPS_Concept/DAY-1/Calculator.java

@@ -0,0 +1,69 @@
+
+import java.util.*;
+
+class Number {
+    double num1, num2;
+
+    Number(double num1, double num2) {
+        this.num1 = num1;
+        this.num2 = num2;
+    }
+
+    double add() {
+        return num1 + num2;
+    }
+
+    double subtract() {
+        return num1 - num2;
+    }
+
+    double multiply() {
+        return num1 * num2;
+    }
+
+    double divide() {
+        return num2 != 0 ? num1 / num2 : Double.NaN;
+    }
+}
+
+public class Calculator {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.print("Enter first number: ");
+        double num1 = scanner.nextDouble();
+
+        System.out.print("Enter second number: ");
+        double num2 = scanner.nextDouble();
+
+        Number numbers = new Number(num1, num2);
+
+        System.out.println("Select Operation: 1. Add 2. Subtract 3. Multiply 4. Divide");
+        int choice = scanner.nextInt();
+
+        switch (choice) {
+            case 1:
+                System.out.println("Result: " + numbers.add());
+                break;
+            case 2:
+                System.out.println("Result: " + numbers.subtract());
+                break;
+            case 3:
+                System.out.println("Result: " + numbers.multiply());
+                break;
+            case 4:
+                double result = numbers.divide();
+                if (Double.isNaN(result)) {
+                    System.out.println("Division by zero is not allowed.");
+                } else {
+                    System.out.println("Result: " + result);
+                }
+                break;
+            default:
+                System.out.println("Invalid choice.");
+        }
+
+        scanner.close();
+    }
+}
+

OOPS_Concept/DAY-1/DataTypes.java

@@ -0,0 +1,16 @@
+
+public class DataTypes {
+    public static void main(String[] args) {
+        System.out.println("Default Values and Sizes of Primitive Data Types in Java:");
+
+        System.out.println("byte: Default = 0, Size = " + Byte.BYTES + " bytes");
+        System.out.println("short: Default = 0, Size = " + Short.BYTES + " bytes");
+        System.out.println("int: Default = 0, Size = " + Integer.BYTES + " bytes");
+        System.out.println("long: Default = 0L, Size = " + Long.BYTES + " bytes");
+        System.out.println("float: Default = 0.0f, Size = " + Float.BYTES + " bytes");
+        System.out.println("double: Default = 0.0d, Size = " + Double.BYTES + " bytes");
+        System.out.println("char: Default = '\\u0000', Size = " + Character.BYTES + " bytes");
+        System.out.println("boolean: Default = false, Size = JVM dependent");
+    }
+}
+

OOPS_Concept/DAY-1/Example.java

@@ -0,0 +1,7 @@
+public class Example {
+    public static void main(String[] args) {
+        System.out.println("Srishti");
+        System.out.println("2301020293");
+        System.out.println("06/08/2003");
+    }
+}

OOPS_Concept/DAY-1/First.java

@@ -0,0 +1,5 @@
+public class First {
+    public static void main(String[] args) {
+        System.out.println("hello");
+    }
+}

OOPS_Concept/DAY-1/FirstSecond.java

@@ -0,0 +1,23 @@
+import java.util.Scanner;
+
+public class FirstSecond {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+
+        System.out.print("Enter your name: ");
+        String name = sc.nextLine();
+        System.out.println("Name: " + name);
+
+        System.out.print("Enter your registration number: ");
+        int regNo = sc.nextInt();
+        System.out.println("Registration Number: " + regNo);
+
+        System.out.print("Enter your date of birth: ");
+       sc.nextLine();
+        String dob = sc.nextLine();
+        System.out.println("Date of Birth: " + dob);
+
+        sc.close(); 
+    }
+}
+

OOPS_Concept/DAY-1/Number.java

@@ -0,0 +1,10 @@
+public class Number {
+  public static void main(String args[]) {
+    int number=10,number2=110;
+        System.out.println("value of number is "+number+" and number2 is "+number2);
+        int n1=2;
+        int n2=3;
+        float sum=n1+n2;
+        System.out.println("values of  sum is "+n1+ "and "+n2+" is "+sum);
+  }
+}

OOPS_Concept/DAY-1/Operators.java

@@ -0,0 +1,39 @@
+
+
+import java.util.*;
+
+public class Operators {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.print("Enter the first number: ");
+        int a = scanner.nextInt();
+        System.out.print("Enter the second number: ");
+        int b = scanner.nextInt();
+
+
+        System.out.println("\nArithmetic Operators:");
+        System.out.println("Addition: " + a + " + " + b + " = " + (a + b));
+        System.out.println("Subtraction: " + a + " - " + b + " = " + (a - b));
+        System.out.println("Multiplication: " + a + " * " + b + " = " + (a * b));
+        System.out.println("Division: " + a + " / " + b + " = " + (b != 0 ? (a / b) : "Undefined (Division by zero)"));
+        System.out.println("Modulus: " + a + " % " + b + " = " + (b != 0 ? (a % b) : "Undefined (Division by zero)"));
+
+
+        System.out.println("\nRelational Operators:");
+        System.out.println(a + " > " + b + ": " + (a > b));
+        System.out.println(a + " < " + b + ": " + (a < b));
+        System.out.println(a + " == " + b + ": " + (a == b));
+        System.out.println(a + " != " + b + ": " + (a != b));
+        System.out.println(a + " >= " + b + ": " + (a >= b));
+        System.out.println(a + " <= " + b + ": " + (a <= b));
+
+
+        System.out.println("\nLogical Operators:");
+        System.out.println("(" + a + " > 0) && (" + b + " > 0): " + ((a > 0) && (b > 0)));
+        System.out.println("(" + a + " > 0) || (" + b + " > 0): " + ((a > 0) || (b > 0)));
+        System.out.println("!(" + a + " > 0): " + (!(a > 0)));
+
+        scanner.close();
+    }
+}

OOPS_Concept/DAY-1/Swap.java

@@ -0,0 +1,33 @@
+
+import java.util.*;
+
+public class Swap {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.print("Enter the first number: ");
+        int a = scanner.nextInt();
+        System.out.print("Enter the second number: ");
+        int b = scanner.nextInt();
+
+        int temp = a;
+        a = b;
+        b = temp;
+
+        System.out.println("After swapping using third variable: a = " + a + ", b = " + b);
+
+        System.out.print("Enter the first number again: ");
+        a = scanner.nextInt();
+        System.out.print("Enter the second number again: ");
+        b = scanner.nextInt();
+
+        a = a + b;
+        b = a - b;
+        a = a - b;
+
+        System.out.println("After swapping without using third variable: a = " + a + ", b = " + b);
+
+        scanner.close();
+    }
+}
+

OOPS_Concept/DAY-2/AlphaPattern.java

@@ -0,0 +1,11 @@
+public class AlphaPattern {
+        public static void main(String[] args) {
+            int n = 5; 
+            for (int i = n; i >= 1; i--) {
+                for (char j = 'A'; j < 'A' + i; j++) {
+                System.out.print(j + " ");
+            }
+            System.out.println();
+        }
+    }
+}

OOPS_Concept/DAY-2/AlphaPattern2.java

@@ -0,0 +1,16 @@
+public class AlphaPattern2{ 
+	public static void main(String[] args) 
+	{ 
+		int i, j, n = 5; 
+		for (i = n; i >= 1; i--) 
+		{ 
+			for (j = i; j <= n; j++) 
+			{ 
+				System.out.printf("%c ", ('A' + j - 1)); 
+			} 
+			System.out.println(""); 
+		} 
+	} 
+} 
+
+

OOPS_Concept/DAY-2/Armstrong.java

@@ -0,0 +1,125 @@
+<<<<<<< HEAD
+import java.util.Scanner;
+
+public class Armstrong {
+
+    public static int sumOfDigits(int num) {
+        int sum = 0;
+        while (num > 0) {
+            sum += num % 10;
+            num /= 10;
+        }
+        return sum;
+    }
+    public static boolean isPrime(int num) {
+        if (num <= 1) {
+            return false;
+        }
+        for (int i = 2; i < num; i++) {
+            if (num % i == 0) {
+                return false;
+            }
+        }
+        return true;  
+    }
+
+    public static boolean isArmstrong(int num) {
+        int sum = 0, temp = num, digit;
+        int n = String.valueOf(num).length();
+        while (temp > 0) {
+            digit = temp % 10;
+            sum += Math.pow(digit, n);
+            temp /= 10;
+        }
+        return sum == num;
+    }
+
+    public static boolean isPerfect(int num) {
+        int sum = 1;
+        for (int i = 2; i <= num / 2; i++) {
+            if (num % i == 0) {
+                sum += i;
+            }
+        }
+        return sum == num && num != 1;
+    }
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Input a number: ");
+        int num = scanner.nextInt();
+
+        int sum = sumOfDigits(num);
+        System.out.println("Sum is: " + sum);
+
+        System.out.println("Prime: " + (isPrime(sum) ? "Y" : "N"));
+        System.out.println("Armstrong: " + (isArmstrong(sum) ? "Y" : "N"));
+        System.out.println("Perfect: " + (isPerfect(sum) ? "Y" : "N"));
+
+        scanner.close();
+    }
+}
+
+=======
+import java.util.Scanner;
+
+public class Armstrong {
+
+    public static int sumOfDigits(int num) {
+        int sum = 0;
+        while (num > 0) {
+            sum += num % 10;
+            num /= 10;
+        }
+        return sum;
+    }
+    public static boolean isPrime(int num) {
+        if (num <= 1) {
+            return false;
+        }
+        for (int i = 2; i < num; i++) {
+            if (num % i == 0) {
+                return false;
+            }
+        }
+        return true;  
+    }
+
+    public static boolean isArmstrong(int num) {
+        int sum = 0, temp = num, digit;
+        int n = String.valueOf(num).length();
+        while (temp > 0) {
+            digit = temp % 10;
+            sum += Math.pow(digit, n);
+            temp /= 10;
+        }
+        return sum == num;
+    }
+
+    public static boolean isPerfect(int num) {
+        int sum = 1;
+        for (int i = 2; i <= num / 2; i++) {
+            if (num % i == 0) {
+                sum += i;
+            }
+        }
+        return sum == num && num != 1;
+    }
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Input a number: ");
+        int num = scanner.nextInt();
+
+        int sum = sumOfDigits(num);
+        System.out.println("Sum is: " + sum);
+
+        System.out.println("Prime: " + (isPrime(sum) ? "Y" : "N"));
+        System.out.println("Armstrong: " + (isArmstrong(sum) ? "Y" : "N"));
+        System.out.println("Perfect: " + (isPerfect(sum) ? "Y" : "N"));
+
+        scanner.close();
+    }
+}
+
+>>>>>>> 6f1627970ad1d9fbae61cebba598c0922352eee7