---
title: "Zone Selection Notes"
type: "article"
slug: "zone-selection-notes"
url: "http://localhost/article/zone-selection-notes/"
markdown_url: "http://localhost/article/zone-selection-notes.md"
published_at: "2022-10-07T12:24:12+00:00"
modified_at: "2024-05-26T13:32:24+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Paul Holmgren has refined our zone selection program one more step. If you want to know whether a given number falls below, within, or above the selected zone, then the original program works well. If, however, all you want to know is whether or not it falls within the zone, and don’t care whether excluded…"
category:
  - name: "ISTUG Newsletter"
    slug: "istug-newsletter"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/istug-newsletter/"
post_tag:
  - name: "Machine language programming"
    slug: "machine-language"
    taxonomy: "post_tag"
    url: "http://localhost/tag/machine-language/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - name: "Tutorial"
    slug: "tutorial"
    taxonomy: "post_tag"
    url: "http://localhost/tag/tutorial/"
  - name: "Type-in program"
    slug: "type-in-program"
    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "John (Basil) Wentworth"
    slug: "john-basil-wentworth"
    taxonomy: "indiv"
    url: "http://localhost/indiv/john-basil-wentworth/"
  - name: "Paul Holmgren"
    slug: "paul-holmgren"
    taxonomy: "indiv"
    url: "http://localhost/indiv/paul-holmgren/"
publication_r:
  id: 39269
  title: "ISTUG Newsletter"
  type: "periodical"
  url: "http://localhost/periodical/istug-newsletter/"
authors: "John (Basil) Wentworth"
issues_articles:
  - id: 39814
    title: "ISTUG Newsletter Mar 1987"
    type: "issue"
    url: "http://localhost/issue/istug-newsletter-mar-1987/"
pages: "3"
pubdate: "March 1987"
archive_link: false
---

# Zone Selection Notes

[Paul Holmgren](http://localhost/indiv/paul-holmgren/) has refined our zone selection program one more step. If you want to know whether a given number falls below, within, or above the selected zone, then the original program works well. If, however, all you want to know is whether or not it falls within the zone, and don’t care whether excluded values are higher or lower, then the simplified program herewith will do the trick.