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What is Python round function?

Python round () function is a built-in function available with Python. It will return you a float number that will be rounded to the decimal places which are given as input. If the decimal places to be rounded are not specified, it is considered as 0, and it will round to the nearest integer.

What is a negative argument in Python round() function?

You may recall from the earlier section on the Python round () function, that the second argument is the number of decimal places to round to. We can actually pass in a negative value, and the value will round to a multiplier of ten. Let’s see what happens when we apply a negative argument into the round () function:

How do you round a whole number in Python?

For example, the number 2.5 rounded to the nearest whole number is 3. The number 1.64 rounded to one decimal place is 1.6. Now open up an interpreter session and round 2.5 to the nearest whole number using Python’s built-in round () function: Gasp! So, round () rounds 1.5 up to 2, and 2.5 down to 2!

Why do we need a function in Python?

Because Python doesn’t come built-in with a function that allows us to round a number to a given multiple, it may be helpful to build your own. This is what you’ll learn in this section of the tutorial. Why do we want to build functions? Functions allow us to follow the programming DRY ethos, meaning “don’t repeat yourself”.

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