Shell Programming and Scripting

# awk --version
awk version 20070501 (FreeBSD)

# ls -l |awk '{
                   min=min?min:$5                          # Set min=min if min exist, if not set min=$5
              }
                  {
                    if(min>$5) min=$5                      # Asign $5 value to min if min is greater that $5 
                    if(max<$5) max=$5                      # Asign $5 value to max if $5 is greater that max 
                    suma+= $5                              # Addition 5th field value to suma variable
                   }
END    {
           printf "min=%d max=%d suma=%d", min,max,suma    # Format output for eval
         }
'