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step Attribute :

Definition and Usage

The step attribute specifies the legal number intervals for an <input> element.

Example: if step="3", legal numbers could be -3, 0, 3, 6, etc.

Tip: The step attribute can be used together with the max and min attributes to create a range of legal values.

Note: The step attribute works with the following input types: number, range, date, datetime, datetime-local, month, time and week.


Differences Between HTML 4.01 and HTML5

The step attribute is new in HTML5.


Example
<form method="get">
     <input type="number"  step ="3"   >
    <input type="submit" value="Send">
</form>
code
output

 

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