Data Type Measurements (The GNU C Library)

### A.5 Data Type Measurements ¶

Most of the time, if you choose the proper C data type for each object in your program, you need not be concerned with just how it is represented or how many bits it uses. When you do need such information, the C language itself does not provide a way to get it. The header files `limits.h` and `float.h` contain macros which give you this information in full detail.