How to make HTML5 number input field more user friendly?

1. How do I allow only numbers in input field in HTML?
2. How do I restrict input type number in HTML?
3. Why does the HTML input with type number allow the letter E to be entered in the field?

How do I allow only numbers in input field in HTML?

You can use the <input> tag with attribute type='number'. This input field allows only numerical values. You can also specify the minimum value and maximum value that should be accepted by this field.

How do I restrict input type number in HTML?

We use the <input type="number"> to limit an HTML input box so that it only accepts numeric inputs. By using this, we will get a numeric input field.

Why does the HTML input with type number allow the letter E to be entered in the field?

The E stands for the exponent, and it is used to shorten long numbers. Since the input is a math input and exponents are in math to shorten great numbers, so that's why there is an E.