how to check number of specific files in a folder linux code example

Example 1: list number of files in each folder linux

find . -type d -print0 | while read -d '' -r dir; do
    files=("$dir"/*)
    printf "%5d files in directory %s\n" "${#files[@]}" "$dir"
done

Example 2: shell show number of files in each folder

du -a | cut -d/ -f2 | sort | uniq -c | sort -nr