Rounding down a 2 digit float to 1 digit?

[mobichan]

I have a feeling this is a simple solution, but it totally is not clicking in my head at the moment.

I am reducing a float value by half. I need the result to round down its float value. Example: 3.3 * 0.5 = 1.65 ---> I need this to round down to 1.6

All the float values I use in this particular situation are only single digit (one digit to the right of the decimal), which is why I need the result of this operation to be a single digit.

[1Ombra1]

I just put my two cents without analizing the problem.
Multiply yor result by 10 into an integer value, and then divide into a float by 10.0.
I dont know if it can work in fusion but is the first thing that come to my mind.

[alexexhowl]

I have a feeling this is a simple solution, but it totally is not clicking in my head at the moment.

I am reducing a float value by half. I need the result to round down its float value. Example: 3.3 * 0.5 = 1.65 ---> I need this to round down to 1.6

All the float values I use in this particular situation are only single digit (one digit to the right of the decimal), which is why I need the result of this operation to be a single digit.

here formula:
FloatToString$(>Value<, >Number of digits<, >Number of digits after decimal point or -1< )

[mobichan]

Thanks guys. That did the trick. I assume it is faster to do 10mbra1's method? Or is a number to string to number conversion cpu less intensive?

[1Ombra1]

If you need to work only with numbers and no strig you can bypass the conversion using the floor function in one step

floor(yourCalculus*10)/10.0

I am not on the pc now but I think it will work, and I dont remember the corret syntax of the floor functikn in fusion but I am sure to have seen it somewhere.

[1Ombra1]

I have a question, for your application a result of 1.63 and 1.68 is always 1.6 or the second one is 1.7?

[mobichan]

I want to always round down. So 1.6X should always result in 1.6.

[1Ombra1]

I want to always round down. So 1.6X should always result in 1.6.

Ok in this case the formula Floor(1.6xxx * 10)/10.0 is working fine, the problem using Floor is if you use negative number and want -1.6xxx = -1.6 you cant use the floor function because
Floor(-1.6xxxxx *10)/10.0 = -1.7
you need to use the Ceiling function for negative number
Ceiling(-1.6xxxx *10)/10.0 = -1.6

Now you have different options
- You are sure to not use negative number so there is no problem
- You want that -1.6xxxxx = -1.7 and also here no problem
- You want -1.6xxxx = -1.6 you can split the rounding down in two part checking if the original number to round is positive or negative and use the correct function Floor/Ceiling depending on the sign of the number
- You want -1.6xxxx = -1.6 you can try with the suggestion of alexexhowl using the string conversion

The right way to do the thing depends only on how is designed your app.