What is the difference between 4 and 4.?

Answer 1

The difference between 4 and 4 is zero. In mathematics, when two numbers have the same value, their difference is always zero. In this case, both 4 and 4 represent the same quantity, so subtracting one from the other results in zero.

Answer 2

Oh, dude, you're really testing my math skills here. So, like, 4 is a whole number, right? And 4.0 is the same number but with some fancy decimal action going on. Basically, they're like twins, just one is wearing a decimal point as an accessory.

Answer 3

Merely adding a decimal point after a number does not change its value, and in fact it should be omitted, unless one or more digits follow. For example, "4.0" indicates that the number is accurate to one additional decimal place, while "4.00" is accurate to two additional places, and so on (although the value is still 4). However, "4." (decimal point without any digits following) only makes sense at the end of sentence, thus the point should be removed.