gvcvt, gcvtf : format double or float as string

Synopsis

#include <stdlib.h>
char *gcvt(double val, int precision, char *buf);
char *gcvtf(float val, int precision, char *buf);
```### Description

gcvt writes a fully formatted number as a null-terminated string in the buffer *buf. gdvtf produces corresponding character representations of float numbers.

gcvt uses the same rules as the printf format `%.precisiong' : only negative values are signed (with `-'), and either exponential or ordinary decimal-fraction format is chosen depending on the number of significant digits (specified by precision).### Returns

The result is a pointer to the formatted representation of val (the same as the argument buf).

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**Authoritative source**: BUSMASTER DITA help source `gvcvt.dita`, compiled into `BUSMASTER.CHM` with the application.