# Round a list of floats into integers in Python

Last updated: Jul 12, 2022

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## Round a list of floats into integers in Python#

To round a list of floats into integers:

1. Use a list comprehension to iterate over the list.
2. On each iteration, pass the current float to the `round()` function.
3. The new list will only contain integer values.
main.py
```Copied!```list_of_floats = [2.4, 3.5, 6.7, 8.1]

new_list = [round(item) for item in list_of_floats]

# 👇️ [2, 4, 7, 8]
print(new_list)
``````

We used a list comprehension to iterate over the list of floats.

List comprehensions are used to perform some operation for every element, or select a subset of elements that meet a condition.

On each iteration, we pass the current list element to the `round()` function to round it to the nearest integer.

The round function takes the following 2 parameters:

NameDescription
`number`the number to round to `ndigits` precision after the decimal
`ndigits`the number of digits after the decimal, the number should have after the operation (optional)

The `round` function returns the number rounded to `ndigits` precision after the decimal point.

If `ndigits` is omitted, the function returns the nearest integer.
main.py
```Copied!```fav_num = 3.456

result1 = round(fav_num)
print(result1)  # 👉️ 3

result2 = round(fav_num, 2)
print(result2)  # 👉️ 3.46
``````

Alternatively, you can use the `map()` function.

## Round a list of floats into integers using map()#

To round a list of floats into integers:

1. Pass the `round()` function and the list to the `map()` function.
2. The `map()` function will pass each float to the `round()` function.
3. Use the `list()` class to convert the `map` object to a list.
main.py
```Copied!```list_of_floats = [2.4, 3.5, 6.7, 8.1]

new_list = list(map(round, list_of_floats))

# 👇️ [2, 4, 7, 8]
print(new_list)
``````

The map() function takes a function and an iterable as arguments and calls the function with each item of the iterable.

The `map()` function calls the `round()` function will each floating-point number in the list and rounds each value.

The last step is to use the `list()` class to convert the `map` object to a list.

The list class takes an iterable and returns a list object.

Which approach you pick is a matter of personal preference. I'd go with the list comprehension as I find it more direct and easier to read.

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