Instead of writing the number : 1e4; // 10000.0 i want to do it as:
而不是写数字:1e4; // 10000.0我想这样做:
n = 4;
1en; // 10000.0
Its not possible to do that?
它不可能这样做?
1 个解决方案
#1
3
You can use scientific notation in double literals. For example
您可以在双重文字中使用科学记数法。例如
double x = 3e4;
works just fine. This won't work if you replace 4 with a variable, so you can't write 3en. The best you can do is:
工作得很好。如果用变量替换4,这将无效,因此您无法写入3en。你能做的最好的事情是:
int a = 3;
int n = 4;
double x = Double.parseDouble(a + "e" + n);
System.out.println(x); // 30000.0
double y = a * Math.pow(10, n);
System.out.println(y); // 30000.0
#1
3
You can use scientific notation in double literals. For example
您可以在双重文字中使用科学记数法。例如
double x = 3e4;
works just fine. This won't work if you replace 4 with a variable, so you can't write 3en. The best you can do is:
工作得很好。如果用变量替换4,这将无效,因此您无法写入3en。你能做的最好的事情是:
int a = 3;
int n = 4;
double x = Double.parseDouble(a + "e" + n);
System.out.println(x); // 30000.0
double y = a * Math.pow(10, n);
System.out.println(y); // 30000.0