XIRR calculator

To use the calculator, input a series of cashflows like:

Example 1, invested 10000 on 2017/1/1, recurred 1 time(monthly), and received 11000 on 2018/1/1

2017/1/1 -10000 1
2018/1/1 11000 1`

Example 2, invested 10000 on 2017/1/1, recurred 12 times(monthly), and received 130000 on 2018/1/1

2017/1/1 -10000 12
2018/1/1 130000 1

Hit Enter on an empty line to complete inputting, and the calculator will then print the result.