## Purpose

## Return value

## Syntax

`=TRUNC(number,[num_digits])`

*number*- The number to truncate.*num_digits*- [optional] The precision of the truncation (default is 0).

## How to use

The TRUNC function returns a truncated number based on an (optional) number of digits. For example, TRUNC(4.9) will return 4, and TRUNC(-3.5) will return -3. The TRUNC function does no rounding, it simply truncates as specified.

The TRUNC function takes two arguments: *number* and *num_digits*. *Number* is the numeric value to truncate. The *num_digits* argument is optional and specifies the place at which *number* should be truncated. *Num_digits* defaults to zero (0).

### Examples

By default, TRUNC will return the integer portion of a number:

```
=TRUNC(4.9) // returns 4
=TRUNC(-3.5) // returns -3
```

To control the place at which *number* is truncated, provide a value for *num_digits*.

```
=TRUNC(3.141593) // returns 3
=TRUNC(3.141593,0) // returns 3
=TRUNC(3.141593,1) // returns 3.1
=TRUNC(3.141593,2) // returns 3.14
=TRUNC(3.141593,3) // returns 3.141
```

When *num_digits* is negative, the TRUNC function will replace the number at a given place with zero:

```
=TRUNC(999.99,0) // returns 999
=TRUNC(999.99,-1) // returns 990
=TRUNC(999.99,-2) // returns 900
```

### TRUNC vs. INT

The TRUNC function is similar to the INT function because they both can return the integer part of a number. However, TRUNC simply truncates a number, while INT actually rounds a number down to an integer. With positive numbers, and when TRUNC is using the default of 0 for num_digits, both functions return the same results. With negative numbers, the results can be different. INT(-3.1) returns -4, because INT rounds down to the lower integer. TRUNC(-3.1) returns -3. If you simply want the integer part of a number, you should use TRUNC.

### Rounding functions in Excel

Excel provides a number of functions for rounding:

- To round normally, use the ROUND function.
- To round to the nearest multiple, use the MROUND function.
- To round
*down*to the nearest specified*place*, use the ROUNDDOWN function. - To round
*down*to the nearest specified*multiple*, use the FLOOR function. - To round
*up*to the nearest specified*place*, use the ROUNDUP function. - To round
*up*to the nearest specified*multiple*, use the CEILING function. - To round
*down*and return an integer only, use the INT function. - To truncate decimal places, use the TRUNC function.