# ?lamc4

This is a service routine for ?lamc2.

## Syntax

call slamc4( emin, start, base )

call dlamc4( emin, start, base )

## Description

This is a service routine for ?lamc2.

## Input Parameters

start

  REAL for slamc4

  DOUBLE PRECISION for dlamc4

  The starting point for determining emin.

base

  INTEGER. The base of the machine.

## Output Parameters

emin

  INTEGER. The minimum exponent before (gradual) underflow, computed by setting `a = start` and dividing by base until the previous a can not be recovered.

Parent topic: Utility Functions and Routines