At https://lists.freepascal.org/pipermail/fpc-devel/2021-February/043569.html I saw the syntax "value: x: y".

str(value:6:3, valuestr);

What is the name of this and where is it documented? I did tests and saw that Y determines the width of the precision part, but I can't see any effect of X.

Luis Henrique wrote

At https://lists.freepascal.org/pipermail/fpc-devel/2021-February/043569.html I saw the syntax "value: x: y". > str(value:6:3, valuestr); What is the name of this and where is it documented?

It is documented in the official documentation:

https://www.freepascal.org/docs-html/current/rtl/system/str.html

The write procedure also supports these formatting options, they are also documented:

https://www.freepascal.org/docs-html/current/rtl/system/write.html

Michael.

On Tue, Feb 9, 2021 at 2:11 PM Luis Henrique via fpc-pascal <

I guess one can call it optional formatting specifiers. See documentation: https://www.freepascal.org/docs-html/rtl/system/str.html

09.02.2021, 09:15, "Christo Crause" :

I think I was lazy and didn't look in the right place, thanks Michael and Christo.

Luis Henrique wrote

> I guess one can call it optional formatting specifiers.  See documentation: https://www.freepascal.org/docs-html/rtl/system/str.html I think I was lazy and didn't look in the right place, thanks Michael and Christo.

This is standard Pascal real number formatting since at least the mid '70s...

Ralf