Incorrect value while performing an arithmetic subtraction on two elements of a list

Question

I am performing arithmetic subtraction on the elements of a C# list of type double and it results in some incorrect results sometimes

For example I have three elements in the listTempStrike as follows

3.6
3.7
3.8

So, when I perform listTempStrike[1] - listTempStrike[0] it results 0.1 which is true but when I perform listTempStrike[2] - listTempStrike[1] it returns 0.099999999999999645 which I feel is strange. Any better solution to this?

You can either use decimal type instead of double, or simply write Math.Round(listTempStrike[1] - listTempStrike[0], 1), this will round it up to the first decimal — Bedford, Sep 04 '14 at 17:25

score 2 · Answer 1 · answered Sep 04 '14 at 17:25

2

you will need to change the type to decimal instead of float/double

this should solve your issue

answered Sep 04 '14 at 17:25

Fredou

19,848
10
58
113

this one this both the values as 0.0999999645 – DoIt Sep 05 '14 at 18:04

Incorrect value while performing an arithmetic subtraction on two elements of a list

1 Answers1