diff --git a/Decisionml.ipynb b/Decisionml.ipynb
new file mode 100644
index 0000000..450229c
--- /dev/null
+++ b/Decisionml.ipynb
@@ -0,0 +1,86 @@
+{
+ "nbformat": 4,
+ "nbformat_minor": 0,
+ "metadata": {
+ "colab": {
+ "provenance": [],
+ "authorship_tag": "ABX9TyN7gRVOaNVFamNga0m0FXjk",
+ "include_colab_link": true
+ },
+ "kernelspec": {
+ "name": "python3",
+ "display_name": "Python 3"
+ },
+ "language_info": {
+ "name": "python"
+ }
+ },
+ "cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {
+ "id": "view-in-github",
+ "colab_type": "text"
+ },
+ "source": [
+ "![\"Open](\"https://colab.research.google.com/assets/colab-badge.svg\")
"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "Decision Tree Implementation"
+ ],
+ "metadata": {
+ "id": "gIiEk7EZbOJ8"
+ }
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 1,
+ "metadata": {
+ "colab": {
+ "base_uri": "https://localhost:8080/"
+ },
+ "id": "tzAc2dvVariz",
+ "outputId": "e7f2fad8-70d6-4c26-cc22-19b544c5459d"
+ },
+ "outputs": [
+ {
+ "output_type": "stream",
+ "name": "stdout",
+ "text": [
+ "Accuracy: 1.0\n"
+ ]
+ }
+ ],
+ "source": [
+ "from sklearn.tree import DecisionTreeClassifier\n",
+ "from sklearn.model_selection import train_test_split\n",
+ "from sklearn.datasets import load_iris\n",
+ "from sklearn.metrics import accuracy_score\n",
+ "\n",
+ "# Load the iris dataset\n",
+ "iris = load_iris()\n",
+ "X = iris.data\n",
+ "y = iris.target\n",
+ "\n",
+ "# Split data into training and testing sets\n",
+ "X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)\n",
+ "\n",
+ "# Create a Decision Tree Classifier\n",
+ "clf = DecisionTreeClassifier()\n",
+ "\n",
+ "# Train the model\n",
+ "clf.fit(X_train, y_train)\n",
+ "\n",
+ "# Make predictions\n",
+ "y_pred = clf.predict(X_test)\n",
+ "\n",
+ "# Evaluate the model's accuracy\n",
+ "accuracy = accuracy_score(y_test, y_pred)\n",
+ "print(\"Accuracy:\",accuracy)"
+ ]
+ }
+ ]
+}
\ No newline at end of file
diff --git a/SimpleCalculator.java b/SimpleCalculator.java
new file mode 100644
index 0000000..bc6d517
--- /dev/null
+++ b/SimpleCalculator.java
@@ -0,0 +1,60 @@
+import java.util.Scanner;
+
+public class SimpleCalculator {
+
+ public static void main(String[] args) {
+ Scanner scanner = new Scanner(System.in);
+
+ // Displaying the menu
+ System.out.println("Simple Calculator");
+ System.out.println("Select an operation:");
+ System.out.println("1. Addition");
+ System.out.println("2. Subtraction");
+ System.out.println("3. Multiplication");
+ System.out.println("4. Division");
+
+ // Reading the user's choice
+ System.out.print("Enter your choice (1-4): ");
+ int choice = scanner.nextInt();
+
+ // Reading the two numbers
+ System.out.print("Enter first number: ");
+ double num1 = scanner.nextDouble();
+ System.out.print("Enter second number: ");
+ double num2 = scanner.nextDouble();
+
+ double result = 0;
+ boolean validChoice = true;
+
+ // Performing the chosen operation
+ switch (choice) {
+ case 1:
+ result = num1 + num2;
+ break;
+ case 2:
+ result = num1 - num2;
+ break;
+ case 3:
+ result = num1 * num2;
+ break;
+ case 4:
+ if (num2 != 0) {
+ result = num1 / num2;
+ } else {
+ System.out.println("Error: Division by zero is not allowed.");
+ validChoice = false;
+ }
+ break;
+ default:
+ System.out.println("Invalid choice! Please select a valid operation (1-4).");
+ validChoice = false;
+ }
+
+ // Displaying the result
+ if (validChoice) {
+ System.out.println("The result is: " + result);
+ }
+
+ scanner.close();
+ }
+}
diff --git a/TemperatureConverter.java b/TemperatureConverter.java
new file mode 100644
index 0000000..c829d78
--- /dev/null
+++ b/TemperatureConverter.java
@@ -0,0 +1,42 @@
+import java.util.Scanner;
+
+public class TemperatureConverter {
+
+ public static void main(String[] args) {
+
+
+ Scanner input = new Scanner(System.in);
+
+
+ System.out.print("Enter temperature value: ");
+ double temp = input.nextDouble();
+
+ System.out.print("Enter temperature scale (C, F, or K): ");
+ String scale = input.next();
+
+ double celsius;
+ switch(scale.toUpperCase()) {
+ case "C":
+ celsius = temp;
+ break;
+ case "F":
+ celsius = (temp - 32) * 5 / 9;
+ break;
+ case "K":
+ celsius = temp - 273.15;
+ break;
+ default:
+ System.out.println("Invalid temperature scale.");
+ return;
+ }
+
+ double fahrenheit = celsius * 9 / 5 + 32;
+
+ double kelvin = celsius + 273.15;
+
+ System.out.println("Celsius: " + celsius + " C");
+ System.out.println("Fahrenheit: " + fahrenheit + " F");
+ System.out.println("Kelvin: " + kelvin + " K");
+ }
+
+}
\ No newline at end of file
diff --git a/ToDoList.java b/ToDoList.java
new file mode 100644
index 0000000..1de1c41
--- /dev/null
+++ b/ToDoList.java
@@ -0,0 +1,95 @@
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class ToDoList {
+ private static ArrayList tasks = new ArrayList<>();
+
+ public static void main(String[] args) {
+ Scanner scanner = new Scanner(System.in);
+
+ while (true) {
+ System.out.println("\nToDo List:");
+ displayTasks();
+
+ System.out.println("\nChoose an option:");
+ System.out.println("1. Add Task");
+ System.out.println("2. Delete Task");
+ System.out.println("3. Mark Task as Completed");
+ System.out.println("4. Exit");
+
+ System.out.print("Enter your choice: ");
+ int choice = scanner.nextInt();
+
+ switch (choice) {
+ case 1:
+ addTask(scanner);
+ break;
+ case 2:
+ deleteTask(scanner);
+ break;
+ case 3:
+ markAsCompleted(scanner);
+ break;
+ case 4:
+ System.out.println("Exiting ToDo List...");
+ scanner.close();
+ return;
+ default:
+ System.out.println("Invalid choice! Please choose again.");
+ }
+ }
+ }
+
+ private static void displayTasks() {
+ if (tasks.isEmpty()) {
+ System.out.println("No tasks available.");
+ } else {
+ for (int i = 0; i < tasks.size(); i++) {
+ System.out.println((i + 1) + ". " + tasks.get(i));
+ }
+ }
+ }
+
+ private static void addTask(Scanner scanner) {
+ scanner.nextLine(); // Consume newline
+ System.out.print("Enter task description: ");
+ String task = scanner.nextLine();
+ tasks.add(task);
+ System.out.println("Task added successfully.");
+ }
+
+ private static void deleteTask(Scanner scanner) {
+ if (tasks.isEmpty()) {
+ System.out.println("No tasks available to delete.");
+ return;
+ }
+
+ System.out.print("Enter task number to delete: ");
+ int taskNumber = scanner.nextInt();
+ if (taskNumber < 1 || taskNumber > tasks.size()) {
+ System.out.println("Invalid task number!");
+ return;
+ }
+
+ tasks.remove(taskNumber - 1);
+ System.out.println("Task deleted successfully.");
+ }
+
+ private static void markAsCompleted(Scanner scanner) {
+ if (tasks.isEmpty()) {
+ System.out.println("No tasks available to mark as completed.");
+ return;
+ }
+
+ System.out.print("Enter task number to mark as completed: ");
+ int taskNumber = scanner.nextInt();
+ if (taskNumber < 1 || taskNumber > tasks.size()) {
+ System.out.println("Invalid task number!");
+ return;
+ }
+
+ String completedTask = tasks.get(taskNumber - 1) + " (Completed)";
+ tasks.set(taskNumber - 1, completedTask);
+ System.out.println("Task marked as completed.");
+ }
+}
diff --git a/numberguessing.java b/numberguessing.java
new file mode 100644
index 0000000..7e5b213
--- /dev/null
+++ b/numberguessing.java
@@ -0,0 +1,77 @@
+// Java program for the above approach
+import java.util.Scanner;
+
+public class GFG {
+
+ // Function that implements the
+ // number guessing game
+ public static void
+ guessingNumberGame()
+ {
+ // Scanner Class
+ Scanner sc = new Scanner(System.in);
+
+ // Generate the numbers
+ int number = 1 + (int)(100
+ * Math.random());
+
+ // Given K trials
+ int K = 5;
+
+ int i, guess;
+
+ System.out.println(
+ "A number is chosen"
+ + " between 1 to 100."
+ + "Guess the number"
+ + " within 5 trials.");
+
+ // Iterate over K Trials
+ for (i = 0; i < K; i++) {
+
+ System.out.println(
+ "Guess the number:");
+
+ // Take input for guessing
+ guess = sc.nextInt();
+
+ // If the number is guessed
+ if (number == guess) {
+ System.out.println(
+ "Congratulations!"
+ + " You guessed the number.");
+ break;
+ }
+ else if (number > guess
+ && i != K - 1) {
+ System.out.println(
+ "The number is "
+ + "greater than " + guess);
+ }
+ else if (number < guess
+ && i != K - 1) {
+ System.out.println(
+ "The number is"
+ + " less than " + guess);
+ }
+ }
+
+ if (i == K) {
+ System.out.println(
+ "You have exhausted"
+ + " K trials.");
+
+ System.out.println(
+ "The number was " + number);
+ }
+ }
+
+ // Driver Code
+ public static void
+ main(String arg[])
+ {
+
+ // Function Call
+ guessingNumberGame();
+ }
+}