In this HackerRank Head of a Text File #2 problem solution In this challenge, we practice using the head command to display the first n characters of a text file.
Display the first 20 characters of an input file.
Input Format
A text file.
Output Format
Output the first 20 characters of the text file.
Problem solution.
head -c 20
Second solution.
echo "$(head -c 20)"
Third solution.
declare -i len=0 while true; do read -d '$' line let "len = $len + ${#line}" #echo "$len" if [[ $len -ge 20 ]]; then echo "${line:0:20}" fi if [[ ${#line} -eq 0 ]]; then break; fi done
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