Hi
Here is what it says in ABAP documentation.
- Floating point numbers - type F
The value range of type F numbers is 1x10**-307 to 1x10**308 for positive and negative numbers, including 0 (zero). The accuracy range is approximately 15 decimals, depending on the floating point arithmetic of the hardware platform. Since type F data is internally converted to a binary system, rounding errors can occur. Although the ABAP processor tries to minimize these effects, you should not use type F data if high accuracy is required. Instead, use type P data.
It clearly mentions that the accuracy when using type F is appoximately 15 decimals.
Regards,
Philip.