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+{
+  "cells": [
+    {
+      "cell_type": "markdown",
+      "metadata": {
+        "id": "view-in-github",
+        "colab_type": "text"
+      },
+      "source": [
+        "<a href=\"https://colab.research.google.com/github/GEORMC/Nnumerical_Methods_Course/blob/main/GUI.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "c264f503",
+      "metadata": {
+        "id": "c264f503"
+      },
+      "source": [
+        "# GUI Programming with Tkinter\n",
+        "\n",
+        "This notebook introduces GUI programming in Python using the `Tkinter` library.\n",
+        "We will cover:\n",
+        "1. Basic Window\n",
+        "2. Adding Labels\n",
+        "3. Adding Buttons\n",
+        "4. Entry Widget (User Input)\n",
+        "5. Frames and Layouts\n",
+        "6. Menus\n",
+        "7. Grid Layout\n",
+        "8. Message Boxes\n",
+        "9. Final Example: A Simple Calculator\n",
+        "\n",
+        "Let's start creating graphical interfaces!\n"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "c45e96a5",
+      "metadata": {
+        "id": "c45e96a5"
+      },
+      "source": [
+        "## 1. Basic Window\n",
+        "\n",
+        "We start by creating a simple window using `Tkinter`.\n"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "416d5ca9",
+      "metadata": {
+        "id": "416d5ca9"
+      },
+      "outputs": [],
+      "source": [
+        "import tkinter as tk\n",
+        "\n",
+        "# Create the main window\n",
+        "root = tk.Tk()\n",
+        "\n",
+        "# Set the window title\n",
+        "root.title(\"My First GUI\")\n",
+        "\n",
+        "# Set window size (width x height)\n",
+        "root.geometry(\"300x200\")\n",
+        "\n",
+        "# Start the GUI event loop\n",
+        "root.mainloop()\n"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "351abaec",
+      "metadata": {
+        "id": "351abaec"
+      },
+      "source": [
+        "## 2. Adding a Label\n",
+        "\n",
+        "Next, we add a label to the window.\n"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "78645ec9",
+      "metadata": {
+        "id": "78645ec9"
+      },
+      "outputs": [],
+      "source": [
+        "# Create the main window\n",
+        "root = tk.Tk()\n",
+        "root.title(\"Label Example\")\n",
+        "root.geometry(\"300x200\")\n",
+        "\n",
+        "# Create a label\n",
+        "label = tk.Label(root, text=\"Hello, World!\")\n",
+        "label.pack()\n",
+        "\n",
+        "# Start the GUI event loop\n",
+        "root.mainloop()\n"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "1a59f584",
+      "metadata": {
+        "id": "1a59f584"
+      },
+      "source": [
+        "## 3. Adding a Button\n",
+        "\n",
+        "We will add a button that responds when clicked.\n"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "fa7a7f72",
+      "metadata": {
+        "id": "fa7a7f72"
+      },
+      "outputs": [],
+      "source": [
+        "# Function to handle button click\n",
+        "def on_button_click():\n",
+        "    label.config(text=\"Button clicked!\")\n",
+        "\n",
+        "# Create the main window\n",
+        "root = tk.Tk()\n",
+        "root.title(\"Button Example\")\n",
+        "root.geometry(\"300x200\")\n",
+        "\n",
+        "# Create a label\n",
+        "label = tk.Label(root, text=\"Press the button\")\n",
+        "label.pack()\n",
+        "\n",
+        "# Create a button\n",
+        "button = tk.Button(root, text=\"Click me\", command=on_button_click)\n",
+        "button.pack()\n",
+        "\n",
+        "# Start the GUI event loop\n",
+        "root.mainloop()\n"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "c38a77c1",
+      "metadata": {
+        "id": "c38a77c1"
+      },
+      "source": [
+        "## 4. Entry Widget (User Input)\n",
+        "\n",
+        "We add an entry widget that allows user input.\n"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "75a37e4d",
+      "metadata": {
+        "id": "75a37e4d"
+      },
+      "outputs": [],
+      "source": [
+        "# Function to display the entered text\n",
+        "def show_entry():\n",
+        "    label.config(text=\"You entered: \" + entry.get())\n",
+        "\n",
+        "# Create the main window\n",
+        "root = tk.Tk()\n",
+        "root.title(\"Entry Example\")\n",
+        "root.geometry(\"300x200\")\n",
+        "\n",
+        "# Create a label\n",
+        "label = tk.Label(root, text=\"Enter something:\")\n",
+        "label.pack()\n",
+        "\n",
+        "# Create an entry widget\n",
+        "entry = tk.Entry(root)\n",
+        "entry.pack()\n",
+        "\n",
+        "# Create a button to submit\n",
+        "button = tk.Button(root, text=\"Submit\", command=show_entry)\n",
+        "button.pack()\n",
+        "\n",
+        "# Start the GUI event loop\n",
+        "root.mainloop()\n"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "8608ff2a",
+      "metadata": {
+        "id": "8608ff2a"
+      },
+      "source": [
+        "## 5. Frames and Layout\n",
+        "\n",
+        "Frames help organize the layout of your GUI.\n"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "8cecdd6a",
+      "metadata": {
+        "id": "8cecdd6a"
+      },
+      "outputs": [],
+      "source": [
+        "# Create the main window\n",
+        "root = tk.Tk()\n",
+        "root.title(\"Frame Example\")\n",
+        "root.geometry(\"300x200\")\n",
+        "\n",
+        "# Create a frame\n",
+        "frame = tk.Frame(root)\n",
+        "frame.pack()\n",
+        "\n",
+        "# Add widgets to the frame\n",
+        "label = tk.Label(frame, text=\"This is inside a frame\")\n",
+        "label.pack()\n",
+        "\n",
+        "button = tk.Button(frame, text=\"Click me\")\n",
+        "button.pack()\n",
+        "\n",
+        "# Start the GUI event loop\n",
+        "root.mainloop()\n"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "01ed66c3",
+      "metadata": {
+        "id": "01ed66c3"
+      },
+      "source": [
+        "## 6. Menus\n",
+        "\n",
+        "Let's create a simple menu in the window.\n"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "5cb2afc1",
+      "metadata": {
+        "id": "5cb2afc1"
+      },
+      "outputs": [],
+      "source": [
+        "# Function to respond to menu options\n",
+        "def menu_item_click():\n",
+        "    label.config(text=\"Menu item clicked\")\n",
+        "\n",
+        "# Create the main window\n",
+        "root = tk.Tk()\n",
+        "root.title(\"Menu Example\")\n",
+        "root.geometry(\"300x200\")\n",
+        "\n",
+        "# Create a label\n",
+        "label = tk.Label(root, text=\"Menu Example\")\n",
+        "label.pack()\n",
+        "\n",
+        "# Create a menu bar\n",
+        "menu_bar = tk.Menu(root)\n",
+        "\n",
+        "# Create a file menu\n",
+        "file_menu = tk.Menu(menu_bar, tearoff=0)\n",
+        "file_menu.add_command(label=\"Open\", command=menu_item_click)\n",
+        "file_menu.add_command(label=\"Save\", command=menu_item_click)\n",
+        "file_menu.add_separator()\n",
+        "file_menu.add_command(label=\"Exit\", command=root.quit)\n",
+        "\n",
+        "# Add the file menu to the menu bar\n",
+        "menu_bar.add_cascade(label=\"File\", menu=file_menu)\n",
+        "\n",
+        "# Display the menu bar\n",
+        "root.config(menu=menu_bar)\n",
+        "\n",
+        "# Start the GUI event loop\n",
+        "root.mainloop()\n"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "92eb51fc",
+      "metadata": {
+        "id": "92eb51fc"
+      },
+      "source": [
+        "## 7. Grid Layout\n",
+        "\n",
+        "Using `grid()` to arrange widgets.\n"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "4eeb8d9c",
+      "metadata": {
+        "id": "4eeb8d9c"
+      },
+      "outputs": [],
+      "source": [
+        "# Create the main window\n",
+        "root = tk.Tk()\n",
+        "root.title(\"Grid Example\")\n",
+        "root.geometry(\"300x200\")\n",
+        "\n",
+        "# Create labels and entries in a grid\n",
+        "tk.Label(root, text=\"Name:\").grid(row=0, column=0)\n",
+        "tk.Entry(root).grid(row=0, column=1)\n",
+        "\n",
+        "tk.Label(root, text=\"Age:\").grid(row=1, column=0)\n",
+        "tk.Entry(root).grid(row=1, column=1)\n",
+        "\n",
+        "# Start the GUI event loop\n",
+        "root.mainloop()\n"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "10b27c2b",
+      "metadata": {
+        "id": "10b27c2b"
+      },
+      "source": [
+        "## 8. Message Boxes\n",
+        "\n",
+        "Creating message boxes for pop-up dialogs.\n"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "17794a86",
+      "metadata": {
+        "id": "17794a86"
+      },
+      "outputs": [],
+      "source": [
+        "from tkinter import messagebox\n",
+        "\n",
+        "# Function to show message box\n",
+        "def show_message():\n",
+        "    messagebox.showinfo(\"Information\", \"This is a message box!\")\n",
+        "\n",
+        "# Create the main window\n",
+        "root = tk.Tk()\n",
+        "root.title(\"Message Box Example\")\n",
+        "root.geometry(\"300x200\")\n",
+        "\n",
+        "# Create a button to show message box\n",
+        "button = tk.Button(root, text=\"Show Message\", command=show_message)\n",
+        "button.pack()\n",
+        "\n",
+        "# Start the GUI event loop\n",
+        "root.mainloop()\n"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "d9d52404",
+      "metadata": {
+        "id": "d9d52404"
+      },
+      "source": [
+        "## 9. Final Example: A Simple Calculator\n",
+        "\n",
+        "Let's put everything together and create a simple calculator using Tkinter.\n"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "f9eacbbb",
+      "metadata": {
+        "id": "f9eacbbb"
+      },
+      "outputs": [],
+      "source": [
+        "# Function to calculate the result\n",
+        "def calculate():\n",
+        "    try:\n",
+        "        result = eval(entry.get())\n",
+        "        label.config(text=\"Result: \" + str(result))\n",
+        "    except:\n",
+        "        label.config(text=\"Error\")\n",
+        "\n",
+        "# Create the main window\n",
+        "root = tk.Tk()\n",
+        "root.title(\"Simple Calculator\")\n",
+        "root.geometry(\"300x200\")\n",
+        "\n",
+        "# Create an entry widget for input\n",
+        "entry = tk.Entry(root)\n",
+        "entry.pack()\n",
+        "\n",
+        "# Create a label for displaying the result\n",
+        "label = tk.Label(root, text=\"Result: \")\n",
+        "label.pack()\n",
+        "\n",
+        "# Create a button to perform calculation\n",
+        "button = tk.Button(root, text=\"Calculate\", command=calculate)\n",
+        "button.pack()\n",
+        "\n",
+        "# Start the GUI event loop\n",
+        "root.mainloop()\n"
+      ]
+    }
+  ],
+  "metadata": {
+    "colab": {
+      "provenance": [],
+      "include_colab_link": true
+    }
+  },
+  "nbformat": 4,
+  "nbformat_minor": 5
+}
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