xlpTRUNC

PrecisionCalc
xl Precision
Get Your Numbers Right

xlpTRUNC

Truncates a number to an integer by removing the fractional part of the number, with up to 32,767 significant digits of precision. Same as Excel's built-in TRUNC function, but with high precision.

Syntax

xlpTRUNC(num,num_digits,format_negative,format_thousands,format_currency,exponential_notation)

num	Required. The number to be truncated to an integer.
num_digits	Optional. Specifies the precision of the truncation. 0 by default.
format_negative	Optional. Determines whether negatives are formatted with a leading hyphen ("-"), or parentheses ("()"). Set to 1 to format negatives with a leading hyphen. Set to 2 for parentheses. 1 by default. You can also format negatives with a red font.
format_thousands	Optional. Determines whether thousands separators are included. Set to TRUE to include thousands separators. FALSE by default.
exponential_notation	Optional. Determines whether result is formatted in exponential notation. Set to TRUE to format in exponential notation. FALSE by default.
format_currency	Optional. Determines whether currency symbol is included. Set to TRUE to include currency symbol. The currency symbol will be added either to the beginning or to the end of the result, whichever is appropriate for the locale. FALSE by default.

Remarks

Rounds both positive and negatives toward zero, by truncating the fractional part of the number. This is the same behavior as Microsoft Excel's TRUNC function. To round away from zero instead, use xlpROUNDUP instead, using 0 for the num_digits argument. To round all numbers toward negative infinity to the next lower integer (positives toward zero, negatives away from zero), use xlpINT.
xlPrecision results are returned as text that look like numbers, not as values that Excel recognizes as numbers. This is because Excel would truncate the results to 15 significant digits if it recognized them as numbers.
format_negative, format_thousands, format_currency, and exponential_notation are all ignored by the 25 SD edition of xlPrecision.
format_thousands and exponential_notation are ignored by the 35 SD edition of xlPrecision.
num and num_digits can accept both numbers and text.
num and num_digits can accept text formatted with the local currency symbol and thousands separators, and negatives can be formatted with either a leading hyphen or parentheses.
num and num_digits can accept text up to 32,767 characters long.
You can use the results of xlPrecision functions as the operands in other xlPrecision formulas without losing any precision, but using them as operands in Excel's arithmetic functions will truncate them to 15 significant digits.
Decimal symbols, thousands separators, and currency symbols are all localized. This means that an xlPrecision formula that returns "$1,234,567.89" in the USA will return "1.234.567,89 €" in Germany, "1 234 567,89 €" in France, "1 234 567.89 kr" in Estonia, and "1.234.567,89Lek" in Albania.
The 32,767 SD edition can only provide a maximum of 32,767 total characters, including all formatting characters such as decimal, leading hyphen or parentheses for negatives, and thousands separators. As a result, it can only return the maximum 32,767 significant digits when the result is an unformatted positive integer. This is due to Excel's limitation of 32,767 characters in a cell. In all cases, the 32,767 SD edition will give you as many significant digits as possible with the formatting you have chosen.
Depending on how many significant digits the edition of xlPrecision provides, the result may be too long to conveniently view. You can view the full result by right-clicking the cell and choosing Format Cells | Alignment | Wrap Text, and widening the column to the width of the screen. An easy way to view the full result without changing column widths or wrapping text is to right-click the cell, choose Copy, and then paste into Notepad or a word processor.

Examples

Formula	Description	Result
=xlpTRUNC(0.1)	0.1 truncated to an integer.	0
=xlpTRUNC(1.1)	1.1 truncated to an integer.	1
=xlpTRUNC(-0.1)	-0.1 truncated to an integer.	0
=xlpTRUNC(-1.1)	-1.1 truncated to an integer.	-1
=xlpTRUNC(456.789,2)	456.789 truncated to two places to the right of an integer.	456.78
=xlpTRUNC(456.789,2,,,TRUE)	456.789 truncated to two places to the right of an integer, and formatted in exponential notation.	4.5678E+2
=xlpTRUNC(456.789,-2)	456.789 truncated to two places to the left of an integer.	400
=xlpTRUNC(-456.789,-2)	-456.789 truncated to two places to the left of an integer.	-400
=xlpTRUNC(A1,2,TRUE,TRUE)	A1 truncated to an integer, formatted with parentheses (if negative), thousands separators, and currency symbol.