Integer Types
|
Type |
Storage Requirement |
Range (Inclusive) |
|---|---|---|
|
Int |
4 bytes |
–2,147,483,648 to 2,147,483, 647 (just over 2 billion) |
|
Short |
2 bytes |
–32,768 to 32,767 |
|
Long |
8 bytes |
–9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 |
|
Byte |
1 byte |
–128 to 127 |
八进制 ：0x
十六进制 ：0
声明一个long的需要加上l/L
Float-Point Types
|
Type |
Storage Requirement |
Range |
|---|---|---|
|
float |
4 bytes |
approximately ±3.40282347E+38F (6–7 significant decimal digits) |
|
double |
8 bytes |
approximately ±1.79769313486231570E+308 (15 significant decimal digits) |
float要用f/F指定