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Example.md

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+# Example code
+
+[GLFW Introduction](https://www.glfw.org/docs/latest/intro_guide.html)
+
+### Initialize the library
+The library is initialized with glfwInit, which returns **GLFW_FALSE** if an error occurred.
+```c++
+if (!glfwInit()) {
+     // Handle initialization failure
+     return -1;
+}
+```
+
+### Version information
+```c++
+glfwGetVersionString();
+```
+
+### Terminate the library
+Before your application exits, you should terminate the GLFW library if it has been initialized.
+```c++
+glfwTerminate();
+```
+
+## Window
+
+[GLFW Window guide](https://www.glfw.org/docs/latest/window_guide.html)
+
+### Create a windowed mode window and its OpenGL context
+```c++
+  GLFWwindow* window;
+
+  window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
+    if (!window)
+    {
+        glfwTerminate();
+        return -1;
+    }
+
+      /* Make the window's context current */
+    glfwMakeContextCurrent(window);
+```
+
+### Loop until the user closes the window
+
+```c++
+  while (!glfwWindowShouldClose(window))
+    {
+        /* Render here */
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        /* Swap front and back buffers */
+        glfwSwapBuffers(window);
+
+        /* Poll for and process events */
+        glfwPollEvents();
+    }
+```
+
+### Window destruction
+
+```c++
+glfwDestroyWindow(window);
+```