Abstract

The second tr problem from HackerRank.

tr 2

Problem

In this challenge, we practice using the tr command because it is a useful translation tool in Linux.

In a given fragment of text, delete all the lowercase characters \(a-z\).

Input Format

A block of ASCII text.

Output Format

Delete all the lowercase characters in the given block of text.

Sample Input

Hello
World
how are you

Sample Output

H
W

Solution

tr-2.sh

#!/usr/bin/env bash

# shellcheck disable=SC2162
tr -d "[:lower:]" -