use ls-grep-wc in a pipeline to count 7 files inside "sample-files" folder which names start with upper case letter & no more upper case letters for the following letters in the name

HassanOHOsman · HassanOHOsman · commit b0ea22c1207c · 2025-11-13T13:55:31.000Z
diff --git a/shell-pipelines/ls-grep/script-04.sh b/shell-pipelines/ls-grep/script-04.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to count the number of files in the sample-files directory whose name starts with an upper case letter and doesn't contain any other upper case letters.
 # Your output should be the number 7.
+ls sample-files | grep '^[A-Z][^A-Z]*$' | wc -l

Original file line number	Diff line number	Diff line change
`@@ -4,3 +4,4 @@ set -euo pipefail`
`4`	`4`
`5`	`5`	`# TODO: Write a command to count the number of files in the sample-files directory whose name starts with an upper case letter and doesn't contain any other upper case letters.`
`6`	`6`	`# Your output should be the number 7.`
	`7`	`+ls sample-files \| grep '^[A-Z][^A-Z]*$' \| wc -l`