import std.stdio;

void main()
{
	writefln(`%.2g`, 3.11);
	writefln(`%.2f`, 3.11);

	writefln(`%.1g`, 3.11);
	writefln(`%.1f`, 3.11);
}


3.1
3.11
3
3.1

But expected

3.1
3.11
3.1
3.11

Sorry, messed up numbers

Expected:

3.11
3.11
3.1
3.1

Seems g outputs one digit less

On 8/9/17 4:10 PM, Temtaime wrote:
> Sorry, messed up numbers
> 
> Expected:
> 
> 3.11
> 3.11
> 3.1
> 3.1
> 
> Seems g outputs one digit less

I was bugged by this too.

It's not a bug. For the %f specifier, the number represents the number of digits *after* the decimal.

For the %g specifier, the number represents the number of digits *before and after* the decimal.

So:

writefln(`%.1g`, 31.11) -> 31

The most annoying thing is that %g is the default specifier for floating point.

-Steve