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AppGameKit Classic Chat / How do I round a float?

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Divided
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Posted: 29th Jun 2015 07:36
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Greetings,

From all the research I have done, I cannot find evidence that rounding a float in agk exists. Could I be wrong?

I want to be able to display taps per second to two decimal places, however I seem to get results such as:

1.166667

even with using such rounding algorithms as:

( ( Taps / 30.0 ) * 100 ) / 100 )

I believe it is possible in other languages to round decimal places to display say:

1.17 ( double d = 1.166667;
DecimalFormat df = new DecimalFormat("#.##"); ) for example.

My question is simply; Is there a way to display only two decimal places or am I going to have to write IF statements questioning if the number is every possible two decimal float and print it as a String?

Cheers

Measuring programming progress by lines of code is like measuring aircraft building progress by weight.
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Markus
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Posted: 29th Jun 2015 09:20
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you mean this?
=Str( valueFloat, decimals )

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Divided
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Posted: 29th Jun 2015 09:47
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YES!

You're a hero! That took me way to long to figure out. There is surprisingly little information on it out side of the command list in the documentation section.

I should probably have checked there first ay.



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Scraggle
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Posted: 29th Jun 2015 11:29
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Quote: "There is surprisingly little information on it out side of the command list in the documentation section."


Where would you expect to find it?

AGK V2 user - Tier 1 (mostly)
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Divided
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Posted: 29th Jun 2015 16:06
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To be honest, I thought it would be a separate command...
I was looking in the maths section and looking up the declaration of floats and integers.

On the forum as well, I thought someone would be as blind as I am and I tried numerous google searches.

Guess I didn't expect it to be part of the str command.

Measuring programming progress by lines of code is like measuring aircraft building progress by weight.
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Impetus73
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Posted: 29th Jun 2015 16:25
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You are not rounding anything, you are just clipping the displayed value, therefore the string function. To do this in math, 1.166667 would become 1.17 instead of the clipped 1.16

It's like a scissors command for values

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Did Amiga / AMOS programming in the 90's.
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CJB
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Posted: 29th Jun 2015 16:42 Edited at: 29th Jun 2015 16:42
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There is the Round command that can be used to actually round numbers. Okay, it only rounds to the nearest INT, but it can still be useful. For example, using Impetus73's example we could do the following:




The *100 and /100 simply shifts the decimal place along to round to the required accuracy.

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baxslash
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Posted: 29th Jun 2015 17:15
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You can also round up or down (to integer) using floor() and ceil().

If you're dead set on rounding a float value you can do this:
ValFloat(str(myValue#, numDP))

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Divided
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Posted: 30th Jun 2015 06:28
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Cheers lads!

Impetus73, that's what I meant to say haha

CJB, I seem to have forgotten "round" in my example

baxslash, very helpful, thank you!

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