数字文字末尾的 F 和 D 是什么意思?

2022-01-09 00:00:00 floating-point double java

我见过一些这样的符号，但我找不到任何奇怪的地方，

I've seen some of this symbols, but I cannot find anything strange with it,

double d = 5D; float f = 3.0F;

5后面的D和F到底是什么意思?

What does the D and F behind 5 exactly means?

推荐答案

表示这些数字分别是双精度数和浮点数.假设你有

Means that these numbers are doubles and floats, respectively. Assume you have

void foo(int x); void foo(float x); void foo(double x);

然后你打电话

foo(5)

编译器可能会被难住.这就是为什么你可以说 5、5f 或 5.0 来指定类型.

the compiler might be stumped. That's why you can say 5, 5f, or 5.0 to specify the type.

相关文章