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Converting 1000 to 1K

Posted on 2008-06-23
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Last Modified: 2013-12-16
Experts,

Any quick ideas how can i convert above 1000 values to number + K. 1000 to 1K or 10000 to 10K and so on ?
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Question by:dotnetpro
10 Comments
 
LVL 18

Expert Comment

by:Joel Coehoorn
ID: 21846808
How would you want numbers like 1234 to look?  Do you need to convert 1000000 to 1M?  1000000000 to 1B?
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LVL 6

Accepted Solution

by:
Bruce_1975 earned 195 total points
ID: 21846812
One possible solution:

Regards,
Bruce
public string ConvertNumber(int Number)
{
    if (Number >= 1000)
        return string.Concat(Number / 1000, "k");
    else
        return Number.ToString();
}

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LVL 3

Expert Comment

by:darkmooink
ID: 21846819
i dont know how to do it in c# but here is the methodology
if n > 1000 then x=n/1000
result = x & "k"
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LVL 55

Expert Comment

by:Jaime Olivares
ID: 21846896
what about with megas?
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LVL 18

Assisted Solution

by:Joel Coehoorn
Joel Coehoorn earned 180 total points
ID: 21846973
This should scale a little farther:

string GetKNotation(long value)
{
    string[] suffix = {"", "K","M", "B", "T"}; // what's after T?
    int power = 3;
    while (Math.Pow(10, power) < value)
        power++;
    power--; //was one greater than what we needed
 
    return (value / (long)Math.Pow(10, power)).ToString() + suffix[power/3];
}

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LVL 18

Expert Comment

by:Joel Coehoorn
ID: 21847019
Arg, got ahead of myself.  In trying to optimize the power variable to skip a few iterations I broke it for very small numbers (<100).  This is better:
string GetKNotation(long value)
{
    string[] suffix = {"", "K","M", "B", "T"}; // what's after T?
    int power = 1;
    while (Math.Pow(10, power) < value)
        power++;
    power--; //was one greater than what we needed
 
    return (value / (long)Math.Pow(10, power)).ToString() + suffix[power/3];
}

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LVL 6

Expert Comment

by:Bruce_1975
ID: 21847061
What comes next... http://en.wikipedia.org/wiki/SI_prefix

Regards,
Bruce
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LVL 6

Expert Comment

by:Bruce_1975
ID: 21847074
and if you can't get enough of big (and small) numbers: http://en.wikipedia.org/wiki/Non-SI_unit_prefix

Regards,
Bruce
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LVL 18

Expert Comment

by:Joel Coehoorn
ID: 21847099
Hehe, yeah I can find that page.  But if I followed that guide I would have used a G for Billion (Giga)  instead of a B.  The next up is either P for Peta or Q for Quadrillion, so there's still some confusion.  Since I used a B for Billion I should probably choose a Q, but then what would you use for Quintillion?
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LVL 6

Expert Comment

by:Bruce_1975
ID: 21847767
Hi jcoehoorn,
there was a little mistake in your code. I fixed it and added the missing extensions.

Regards,
Bruce
string GetKNotation(long value)
{
    string[] suffix = {"", "k","M", "G", "T" , "P", "E", "Z", "Y"}; // what's after Y?
    int power = 0;
    while (Math.Pow(10, power) < value)
        power += 3;
    power -= 3; //was one greater than what we needed
 
    return (value / (long)Math.Pow(10, power)).ToString() + suffix[power/3];
}

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