Microsoft.Scripting.Math.BigInteger.Abs C# (CSharp) Method

    public BigInteger Abs() {
      if (this.sign == -1) return -this;
      else return this;
    }

        // Like GetBitCount(Abs(x)), except 0 maps to 0
        public static int BitLength(BigInteger x) {
            if (x.IsZero()) {
                return 0;
            }

            return x.Abs().GetBitCount();
        }