How do I round numbers up in Python?

Rounding Numbers Up in Python

Rounding a number up means finding the closest integer that is greater than or equal to the given number. While Python's round() function typically rounds numbers down, there are other ways to achieve rounding up.

Using math Module

The math module in Python provides a ceil() function that rounds numbers up to the nearest integer.

Python 3:

import math

x = 4.2
print(math.ceil(x))  # Output: 5

Python 2:

import math

x = 4.2
print(int(math.ceil(x)))  # Output: 5

Int Type Casting

Another method is to add 0.5 to the number and then cast it to an integer. However, this method is known to round numbers down in certain cases.

x = 2.3
print(int(x + 0.5))  # Output: 2

Therefore, using the math.ceil() function is the preferred approach for rounding numbers up in Python.

The above is the detailed content of How do I round numbers up in Python?. For more information, please follow other related articles on the PHP Chinese website!