The Radio portion of the input is used to pick a selected item. Think of this as part of a quiz with a multiple choice being the common answers being a, b, c, or d. It is also used to select an option on whether you are involved with political parties and voting purposes. Thinking about it even further, this is a common trait and doesn’t usually go overboard with the amount of choices. This item has no optional items, as they are all required. The key traits with the <input> tag are the type, name, and value, which is really self-explanatory. I’m going to show you a few examples of these with different options.

List of <input type=radio> tag's attributes
type=radio Determines the type of <input> element.
name Gives radiobox a name.
value Set a value of a radiobox.
checked Activate a radiobox.
disabled Disable a radiobox

Examples

When was the last time the Indians won the World Series?

<input type="radio" name="indians" value="1958"> 1958<br>
<input type="radio" name="indians" value="1964"> 1964<br>
<input type="radio" name="indians" value="1948"> 1948<br>
<input type="radio" name="indians" value="Never"> Never

 1958
 1964
 1948
 Never It's a simple set o radioboxes.

<input type="radio" name="radiobox" value="Just radiobox"> Just radiobox
<input type="radio" name="radiobox" value="Selected radiobox" checked> Selected radiobox
<input type="radio" name="radiobox" value="Disabled radiobox" disabled> Disabled radiobox

 Just radiobox
 Selected radiobox
 Disabled radiobox
This example shows how you can create pre-selected and disabled radioboxes.

It takes practice but it can be mastered overtime. Remember, you have to have the <form> tag to put it inside. Once you have it mastered, it should be in good shape.

HTML Forms menu.