Bash script to output a horizontal line spanning the width of the terminal using dashes (or optional string provided)

printHorizontalLine

# Usage: printHorizontalLine [c]

function printHorizontalLine {
   local c="-"
   local strlen=1
   if [ -n "$1" ]; then
     c=$1
     strlen=${#c}
   fi
   echo
   x=0
   N=$(tput cols)
   while [ $x -lt "$N" ]
   do
      echo -n $c
      let x=$x+$strlen
   done
   echo;
}