Can I use awk to convert all the lower-case letters into upper-case?

Question

I have a file mixed with lower-case letters and upper-case letters, can I use awk to convert all the letters in that file into upper-case?

Answer 1

Try this:

awk '{ print toupper($0) }' <<< "your string"

Using a file:

awk '{ print toupper($0) }' yourfile.txt