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Use the “checked” property of the radio button element for validating a radio button using JavaScript. It gives a boolean value “true” if the radio button is selected/checked, if it gives “false”, it means the radio button is “not-checked”.

Radio buttons provide a list of options and allow the user to select only one. They are most useful for yes/no questions or to select a single preference from a list of choices. Once one of the radio buttons has been selected, it can only be unselected by selecting another radio button.

Radio buttons should be vertically listed and have one option always selected.

Use radio buttons to let users select from two or more mutually exclusive options. Use radio buttons when users need to see all options before they make a selection. Radio buttons emphasize all options equally, which means that some options might draw more attention than is necessary or desired.

Create HTML Use a <form> element. Add three <label> elements with the radio input type, name and value attributes. Add the required attribute within the first <label>. Add an <input> with the type “submit”.

The HTML <form> element contains child elements that collect user input, such as <input type=”radio”>. To make a basic form with radio buttons in it, wrap your radio button grouping(s) in a <form> tag, and include a <button> of type submit at the bottom.

The required attribute is a boolean attribute. When present, it specifies that an input field must be filled out before submitting the form. Note: The required attribute works with the following input types: text, search, url, tel, email, password, date pickers, number, checkbox, radio, and file.

Create HTML Use a <form> element. Add three <label> elements with the radio input type, name and value attributes. Add the required attribute within the first <label>. Add an <input> with the type “submit”.

Use the “checked” property of the radio button element for validating a radio button using JavaScript. It gives a boolean value “true” if the radio button is selected/checked, if it gives “false”, it means the radio button is “not-checked”.

Radio buttons provide a list of options and allow the user to select only one. They are most useful for yes/no questions or to select a single preference from a list of choices. Once one of the radio buttons has been selected, it can only be unselected by selecting another radio button.

Radio buttons should be vertically listed and have one option always selected.

Use radio buttons to let users select from two or more mutually exclusive options. Use radio buttons when users need to see all options before they make a selection. Radio buttons emphasize all options equally, which means that some options might draw more attention than is necessary or desired.

Create HTML Use a <form> element. Add three <label> elements with the radio input type, name and value attributes. Add the required attribute within the first <label>. Add an <input> with the type “submit”.

The HTML <form> element contains child elements that collect user input, such as <input type=”radio”>. To make a basic form with radio buttons in it, wrap your radio button grouping(s) in a <form> tag, and include a <button> of type submit at the bottom.

The required attribute is a boolean attribute. When present, it specifies that an input field must be filled out before submitting the form. Note: The required attribute works with the following input types: text, search, url, tel, email, password, date pickers, number, checkbox, radio, and file.