ROUNDDOWN

ROUNDDOWN(number, num_digits)

Returns the number rounded down to a certain number of decimal places or digits.

number	The number you want to round down (towards zero).
num_digits	The number of decimal places you want to round the number to.

REMARKS

* Positive decimal numbers are rounded down to the nearest integer.
* Negative decimal numbers are rounded down to the nearest integer.
* This function is identical to the ROUND function, except that it always rounds a number down.
* If "number" is not numeric, then #VALUE! is returned.
* If "num_digits" > 0, then "number" is rounded down to the specified number of decimal places.
* If "num_digits" = 0 then "number is rounded down to the nearest integer.
* If "num_digits" < 0, then "number" is rounded down to the left of the decimal point.
* If "num_digits" is not numeric, then #VALUE! is returned.
* You can use the ROUND function to round to a certain number of decimal places or digits.
* You can use the ROUNDUP function to round up to a certain number of decimal places or digits.
* You can use the FLOOR.MATH function to round down to the nearest integer or multiple.
* You can use the CEILING.MATH function to round up to the nearest integer or multiple.
* You can use the INT function to return a number rounded down to the nearest integer.
* You can use the MROUND function to round to a certain multiple.
* You can use the EVEN function to round up to the nearest even integer.
* You can use the ODD function to round up to the nearest odd integer.
* For the Microsoft documentation refer to support.microsoft.com

	A
1	=ROUNDDOWN(1.1, 0) = 1
2	=ROUNDDOWN(1.5, 0) = 1
3	=ROUNDDOWN(1.9, 0) = 1
4	=ROUNDDOWN(-1.1, 0) = -1
5	=ROUNDDOWN(-1.5, 0) = -1
6	=ROUNDDOWN(-1.9, 0) = -1
7	=ROUNDDOWN(123.456, 0) = 123
8	=ROUNDDOWN(123.567, 0) = 123
9	=ROUNDDOWN(-123.456, 0) = -123
10	=ROUNDDOWN(-123.567, 0) = -123
11	=ROUNDDOWN(123.456, 4) = 123.4560
12	=ROUNDDOWN(123.456, 3) = 123.456
13	=ROUNDDOWN(123.456, 2) = 123.45
14	=ROUNDDOWN(123.456, 1) = 123.40
15	=ROUNDDOWN(123.456, -1) = 120
16	=ROUNDDOWN(123.456, -2) = 100
17	=ROUNDDOWN(123.456, -3) = 0
18	=ROUNDDOWN(123.456, -4) = 0
19	=ROUNDDOWN("", 0) = #VALUE!
20	=ROUNDDOWN(1.1, "") = #VALUE!

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