In this HackerRank ‘Tr’ Command #2 problem-solution 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.
Problem solution.
tr -d [a-z]
Second solution.
tr -d '[:lower:]'
Third solution.
read A while [[ -n "$A" ]] do echo "$A" | tr -d [a-z] read A done echo ""