Problem Statement

Open a text file and count the occurrences of each letter. Some of these programs count all characters (including punctuation), but some only count letters A to Z.

Let's start with the solution:

# usage: awk -f letters.awk HolyBible.txt

BEGIN { FS="" }
      { for(i=1;i<=NF;i++) m[$i]++}
END   { for(i in m) printf("%9d %-14s\n", m[i],i) }