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# Significant digits in integer numbers

Posted 10 years ago
 Hi, This seems to be a silly question, but I was not able to find an easy solution. I have an integer number which I must show as a currency. For example: NumberForm[1738517, {1, 2}, DigitBlock -> 3] How can I proceed to get this number to just one significant figure and still keeping the currency format (2,000,000.00)?
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Posted 10 years ago
 HiThis will do it NumberForm[Ceiling[1738517, 10^(IntegerLength[1738517] - 1)], {1, 2}, DigitBlock -> 3] The Ceiling function is the one to get it to n significant digits like In[9]:= Ceiling[1738517, 1000000] Out[9]= 2000000 You will need some means of identifying how many digits are in the number before hand, easy enough if the actual number is a variable.Hope that helps.
Posted 10 years ago
 Dear Paul,Thank you very much. This solved the problem. I just had to replace Ceiling by Round in order to correctly handle rounding.Regards, Anderson