# How to Round Numbers Up and Down in Python

It is common to have numbers that need to be rounded in Python. Fortunately, there is a native Python `round()`

function for rounding decimal/floating-point numbers to their nearest integer and a `math`

package with methods for always rounding up or down to a whole number.

In this tutorial, we will learn how to round numbers in Python in a variety of different ways with examples.

## Round to the Nearest Integer

To round to the nearest whole number, supply the decimal/floating-point number inside the `()`

(parenthesis) of the `round()`

function. In the example below, we will store the output from `round()`

in a variable before printing it.

```
# round to nearest integer
rounded = round(1.35)
print(rounded)
```

```
1
```

The nearest integer to `1.35`

is `1`

and when we put that float into `round()`

, `1`

was indeed returned.

## Round Float Up

To always round a number up to an integer regardless of whether it is the closest whole number we can use the `ceil()`

method, which is available on the math package. To use it, import the math package and then pass the number to round up in the `()`

(parenthesis) or `math.ceil()`

.

```
# round float up
import math
result = math.ceil(1.35)
print(result)
```

```
2
```

`2`

is not the closest integer to `1.35`

but `ceil()`

rounded it up anyway.

## Round Float Down

Two always round a number down, use the `floor()`

method of the math package passing the number to round inside the `()`

(parenthesis) of `math.floor()`

.

```
# round float down
import math
result = math.floor(1.75)
print(result)
```

```
1
```

In the example above, `math.floor()`

rounded `1.75`

down to `1`

.

## Round to a Fixed Number of Decimal Places

To round to a decimal place on a number, pass the level to round to as the second argument of the `round()`

function.

```
# round to a fix decimal place
rounded = round(1.35, 1)
print(rounded)
```

```
1.4
```

In the example above we are essentially rounding `3.5`

as that is the first decimal place in `1.35`

.

## Round all Values in a Python list

To round all the values in a list we can loop through the list of numbers and round each value before appending it to a new array.

```
# round all numbers in a list
numbers = [1.23, 4.435, 2.532, 6.2, 1.6]
rounded_list = []
for num in numbers:
rounded_list.append(round(num))
print(rounded_list)
```

```
[1, 4, 3, 6, 2]
```

## Using list Comprehension

A shorter way to round a list and create a new one containing those values is to use list comprehension. Let's perform the exact same task ask above with list comprehension.

```
# round list numbers with list comprehension
numbers = [1.23, 4.435, 2.532, 6.2, 1.6]
rounded_list = [round(num) for num in numbers]
print(rounded_list)
```

```
[1, 4, 3, 6, 2]
```

## Conclusion

You know now how to round numbers in Python in a variety of different ways depending on how the rounding should behave.