Best design for input of solely negative numbers via numeric keypad

1. How do you handle negative numbers in Python?
2. Is there any way to prevent input type number getting negative values?
3. How to restrict negative values in input type number in Java?

How do you handle negative numbers in Python?

In Python, positive numbers can be changed to negative numbers with the help of the in-built method provided in the Python library called abs (). When abs () is used, it converts negative numbers to positive. However, when -abs () is used, then a positive number can be changed to a negative number.

Is there any way to prevent input type number getting negative values?

Add a little bit of JavaScript to disable negative number typing. To disallow the typing of negative numbers, we need to add the onkeypress attribute and use a little bit of JavaScript here. You can directly place this in the HTML, so it's very lightweight.

How to restrict negative values in input type number in Java?

If you want to restrict the <input> field to only positive numbers, you can use the min attribute.