數值值域(Range)與精確度(Precision)
整數
type
low
high
byte
-128
127
short
-32768
32767
int
-2,147,483,648
+2,147,483,647
long
-9,223,372,036,854,775,808
+9,223,372,036,854,775,807
浮點數
type
precision
float
6-7 digits
double
13-14 digits