在C ++中，用于引用32位浮点值的关键字是什么？

Question

在C ++中，用于引用32位浮点值的关键字是什么？：

Answer 1

float

这几乎总是32b IEEE浮点数

Answer 2

float

here's an example:

float var = 0.0f;

Notice the lowercase f to indicate the literal should be interpreted as a 32-bit floating point number.

Answer 3

float - 32 bits
double - 64 bits

Answer 4

Currently, the IEEE-754 32-bit floating point is represented by the keyword float .

float myVar = 0.8;
myVar = 4.0f;

For 64-bit floating point values, there's double :

double myVar = 0.8;
myVar = 4.0f;