How to resolve the algorithm Check that file exists step by step in the Racket programming language

Published on 12 May 2024 09:40 PM
#Racket

How to resolve the algorithm Check that file exists step by step in the Racket programming language

Table of Contents

Problem Statement

Verify that a file called     input.txt     and   a directory called     docs     exist.

This should be done twice:

Optional criteria (May 2015):   verify it works with:

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Check that file exists step by step in the Racket programming language

Source code in the racket programming language

#lang racket

;; here
(file-exists? "input.txt")
(file-exists? "docs")

;; in the root
(file-exists? "/input.txt")
(file-exists? "/docs")

;; or in the root with relative paths
(parameterize ([current-directory "/"])
  (and (file-exists? "input.txt")
       (file-exists? "docs")))

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