decimal value format to whole value

[robertgalusha]

I have a VI that when run, can return one of the various answers with a decimal format displayed below:

1.3661

13.661

136.61

1366.1

For any of these return values, I would like to format the value to return 4 digits as a whole number like this:

1336

[GerdW · Accepted solution]

Hi Robert,

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@robertgalusha wrote:

1.3661

13.661

136.61

1366.1

For any of these return values, I would like to format the value to return 4 digits as a whole number like this:

1336

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What is the question?

What have you tried? Where are you stuck?

Are there other things to consider? (Like negative numbers with leading minus char!?)

What is the expected input range of those numeric values?

Ideas:

• Convert the number to string, replace the point by an empty char, keep the first 4 chars, (convert back to integer if needed)…
• Use some math to scale the numeric value to the range [1000, 9999], then round to next integer…

[billko]

Are you trying to return the four significant digits?  Is this some kind of homework exercise?  (Note: if it is, it doesn't disqualify you from receiving a solution, but it may determine how we help you arrive at one.)

[Gregory]

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@robertgalusha wrote:

I have a VI that when run, can return one of the various answers with a decimal format displayed below:

1.3661

13.661

136.61

1366.1

For any of these return values, I would like to format the value to return 4 digits as a whole number like this:

1336

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Just trying to figure out the pattern here, all of your numbers have 13661 with the decimal place moving around, but you want to return 1336. Is that right, or do you really want 1366?

Kind of brute force, but I would convert to fractional string, search and replace "." with "" (empty string), and get string subset of length 4.

[altenbach]

Maybe something like that?

[thols]

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I would like to format the value to return 4 digits as a whole number like this:

1336

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I should wait for the "is this homework?" reply, but since Altenbach already posted a solution, I couldn't resist:

Are you sure it's not 1337 you want to return? In that case you can do like this:

[robertgalusha]

Ideas:

• Convert the number to string, replace the point by an empty char, keep the first 4 chars, (convert back to integer if needed)…
• Use some math to scale the numeric value to the range [1000, 9999], then round to next integer…

[GerdW]

Hi Robert,

I would prefer the "math" way as suggested and as shown by Christian…

[altenbach]

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@robertgalusha wrote:

Ideas:

• Convert the number to string, replace the point by an empty char, keep the first 4 chars, (convert back to integer if needed)…
• Use some math to scale the numeric value to the range [1000, 9999], then round to next integer…

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You did not say what "this" is that worked (there are two suggestions!), but if you implemented the first option, it will fail if the input number is less than 1. You would also need to deal with leading zeroes, etc.

[billko]

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@thols wrote:

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I would like to format the value to return 4 digits as a whole number like this:

1336

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I should wait for the "is this homework?" reply, but since Altenbach already posted a solution, I couldn't resist:

Are you sure it's not 1337 you want to return? In that case you can do like this:

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I already furnished this response a few posts back.  😉