什么情况下使“ 1.0”（带.0）这样的浮点数成为整数？

Question

I wanted to know if there is such a thing as a integer even tho it has a .0 decimal at the end. Is it considered a float or an integer?

Answer 1

It's still a float. For example, do

print(type(1.0))

It prints float . In general, anything with a decimal point is a float .

Answer 2

In a programming language, what it means to be a "float" versus an "integer" is to have a particular binary representation in the machine.

In Python specifically, which is not statically typed, if you write x = 1.0 then x will be a floating point value. It is stored in memory using a floating point representation, such as IEEE-754 . If you write x = 1 , then x will be an integer. You are telling Python which representation of 1 you want. If you were writing in C and you write, int x = 1.0 , then x would still be an integer, since the compiler knows you want x to be an integer, and the compiler will convert it or generate code to do so.