The HTML <input>tag is used within a form to declare an input element - a control that allows the user to input data.
The following are the attributes −
| Attribute | Value | Description |
|---|---|---|
| accept | content types | Specifies a comma-separated list of content types that the server accepts |
| align | left right top middle bottom | Deprecated − Defines the alignment of content |
| alt | Text | This specifies text to be used in case the browser/user agent can't render the input control |
autocomplete  | on off | Specifies for enabling or disabling of autocomplete in <input> element |
autofocus  | Autofocus | specifies that <input> element should automatically get focus when the page loads |
| checked | Checked | If type = "radio" or type = "checkbox" it will already be selected when the page loads. |
| disabled | Disabled | Disables the input control. The button won't accept changes from the user. It also cannot receive focus and will be skipped when tabbing. |
form  | form_id | Specifies one or more forms |
formaction  | URL | Specifies the URL of the file that will process the input control when the form is submitted |
formenctype | application/x-www-form-urlencoded multipart/form-data text/plain | Specifies how the form-data should be encoded when submitting it to the serve |
formmethod  | post get | Defines the HTTP method for sending data to the action URL |
formnovalidate  | Formnovalidate | Defines that form elements should not be validated when submitted |
fromtarget  | _blank _self _parent _top | Specifies the target where the response will be a display that is received after submitting the form |
height  | Pixels | Specifies the height |
list  | datalist_id | Specifies the <datalist> element that contains pre-defined options for an <input> element |
max  | Autofocus | Specifies the maximum value. |
| maxlength | Number | Defines the maximum number of characters allowed in a text field |
min  | Number | Specifies the minimum value |
multiple  | Multiple | Specifies that a user can enter multiple values |
| name | Text | Assigns a name to the input control. |
pattern  | Regexp | Specifies a regular expression that an <input> element's value is checked against |
placeholder  | Text | Specifies a short hint that describes the expected value. |
| readonly | Readonly | Sets the input control to read-only. It won't allow the user to change the value. The control, however, can receive focus and are included when tabbing through the form controls |
required  | required | Specifies that an input field must be filled out before submitting the form |
| size | Number | Specifies the width of the control. If type = "text" or type = "password" this refers to the width in characters. Otherwise, it's in pixels. |
| src | URL | Defines the URL of the image to display. Used only for type = "image". |
step  | Number | Specifies the legal number intervals for an input field |
| type | button checkboxcolor date datetime datetime-local email file hidden image month number password radio range reset search submit tel text time url week | Specifies the type of control. |
| value | Text | Specifies the intial value for the control.If type = "checkbox" or type = "radio" this attribute is required. |
width  | Pixels | Specifies the width |
Example
You can try to run the following code to implement <input> element in HTML −
<!DOCTYPE html> <html> <head> <title>HTML input Tag</title> </head> <body> <form action = "/cgi-bin/hello_get.cgi" method = "get"> First name: <input type = "text" name = "first_name" value = "" maxlength = "100" /> <br /> Last name: <input type = "text" name = "last_name" value = "" maxlength = "100" /> <input type = "submit" value = "Submit" /> </form> </body> </html>