// NGN Chassis
// Math Functions --------------------------------------------------------------

// @function exponent
// returns passed number multiplied exponentially
// @param {int} $base
// @param {int} $exponent
@function exponent($base, $exponent) {
  $value: $base;

  @if $exponent > 1 {
    @for $i from 2 through $exponent {
      $value: $value * $base;
    }
  }

  @if $exponent < 1 {
    @for $i from 0 through -$exponent {
      $value: $value / $base;
    }
  }

  @return $value;
}

// @function square-root
// returns square-root of passed number
// @param {int} $number
@function square-root($number) {
  @if $number < 0 {
    @warn "Argument for `square-root()` must be a positive number!";
    @return null;
  }
  $value: 1;
  @for $i from 1 through 24 {
    $value: $value - (exponent($value, 2) - $number) / (2 * $value);
  }
  @return $value;
}