![Adding Radio Buttons, Checkboxes & Lists for User Input to HTML Forms - Video & Lesson Transcript | Study.com Adding Radio Buttons, Checkboxes & Lists for User Input to HTML Forms - Video & Lesson Transcript | Study.com](https://study.com/cimages/videopreview/bw3sji79vd.jpg)
Adding Radio Buttons, Checkboxes & Lists for User Input to HTML Forms - Video & Lesson Transcript | Study.com
![Error message: "Each of your radio button elements should be added within the form tag." - HTML-CSS - The freeCodeCamp Forum Error message: "Each of your radio button elements should be added within the form tag." - HTML-CSS - The freeCodeCamp Forum](https://global.discourse-cdn.com/freecodecamp/original/3X/b/1/b1fca9d3c632619cc8ad1bc2664f85372ceb268c.png)
Error message: "Each of your radio button elements should be added within the form tag." - HTML-CSS - The freeCodeCamp Forum
![checkbox y radio en form HTML. select, option y optgroup. multiple. Listas desplegables (opciones) (CU00723B) checkbox y radio en form HTML. select, option y optgroup. multiple. Listas desplegables (opciones) (CU00723B)](http://i.imgur.com/YnR81.jpg)
checkbox y radio en form HTML. select, option y optgroup. multiple. Listas desplegables (opciones) (CU00723B)
![Adding Radio Buttons, Checkboxes & Lists for User Input to HTML Forms - Video & Lesson Transcript | Study.com Adding Radio Buttons, Checkboxes & Lists for User Input to HTML Forms - Video & Lesson Transcript | Study.com](https://study.com/cimages/multimages/16/capture12314144409777946611.png)