# NAG CL InterfaceX02AKC (real_​smallest)

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## 1Purpose

X02AKC returns the smallest positive floating-point number.

## 2Specification

 #include
 double X02AKC
The function may be called by the names: x02akc, nag_machine_real_smallest or nag_real_smallest_number.

## 3Description

X02AKC is a constant defined in the C Header file.
X02AKC returns the smallest positive number in the model of floating-point arithmetic described in the X02 Chapter Introduction. The returned value is equal to ${b}^{{e}_{\mathrm{min}}-1}$, where $b$ is the arithmetic base (see X02BHC) and ${e}_{\mathrm{min}}$ is the minimum exponent (see X02BKC) in the model.

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