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Python TL;DR – The built-in Python round function allows you to round numbers.
How to round in Python
The Python round function rounds a floating point number to a specified amount of decimals:
Example
number = round(37.8452950483520, 4)
print(number)
number2 = round(37.8452950483520, 2)
print(number2)
number3 = round(37.8452950483520)
print(number3)You can also use Python round for negative numbers:
Example
number = round(-14.573883749392, 4)
print(number)
number2 = round(-14.573883749392, 2)
print(number2)
number3 = round(-14.573883749392)
print(number3)
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The syntax for round in Python
The Python round function takes up to two arguments:
- A floating point number to round
- A number of decimals to round the number to
The second argument is optional: if you skip it, the number will be rounded to the nearest integer (no decimals). If using both, you have to separate the arguments with a comma:
round(float, decimals)Python round: useful tips
- Make sure you define both arguments for rounding in Python in numbers – otherwise, a TypeError will fire.
- In some cases, you might get inconsistent results for example,
2.75is rounded to2.8, but2.65is rounded to2.6. It's not a bug: the system simply cannot represent some decimal fractions exactly as floats.
