Add space between every letter

Question

How can I add spaces between every character or symbol within a UTF-8 document? E.g. 123hello! becomes 1 2 3 h e l l o !.

• I have

Answer 1

Shortest sed version

sed 's/./& /g'

Output

$ echo '123hello!' |  sed 's/./& /g'
1 2 3 h e l l o !

Obligatory awk version

awk '$1=$1' FS= OFS=" "

Output

$ echo '123hello!' |  awk '$1=$1' FS= OFS=" "
1 2 3 h e l l o !