On Tuesday, 19 September 2017 at 20:47:02 UTC, greatsam4sure wrote:
double  value = 20.89766554373733;
writeln(value);
//Output =20.8977

How do I output the whole value without using writfln,write or format. How do I change this default

The default when printing floating-point numbers is to show six most significant digits. You can specify the formatting manually with writefln, for example,

    writefln ("%.10f", value);

will print the value with 10 digits after the decimal point.
The writef/writefln function behaves much like printf in C.

See here for a reference on format strings:
https://dlang.org/library/std/format/formatted_write.html#format-string

Ivan Kazmenko.

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