AWK/GAWK function to round float numbers to specified decimal place

round.awk

function round(x, p,   s) {
  # DESC:     Rounds float to the number of decimals specified
  # ARGS:     x (required)  - number to round. float valid
  #           p             - decimal place value rounded to
  #                           defaults 1 if unspecified.
  # RETURN:   rounded float
  # USAGE:    round(5.255,2)
  # NOTES:    Handles positive/negative floats & returns ints
  p = 10^p
  s = 1

  if (x < 0) { x = -x; s = -1; }  
  return s * int(x * p + .5) / p
}