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Round numbers in Python is a very important operation since it is used in almost every field in programming to archive multiple goals. During this article, we will see several methods in python to round numbers such as round up, round down, round to a specific decimal number and round to the nearest integer number. Here is a code snippet that shows how to round a number in Python:
In the previous example we rounded to the nearest integer number the variable
number which value was
3.78. The result is the stored in
rounded_number and it is printed in the console as
This process implies to get a specific float number into the nearest integer number or even to a specific precision of decimals.
Now let’s see some techniques to perform this task:
To round a number to the nearest integer number, we can use the method
round() in Python. This function only takes one number as parameter and it returns the number rounded:
In this example, the
round() function rounds the variable number to the nearest integer number which in this case is
If we want to round a number to a specific amount of decimals, we can use second parameter in
ndigits. This parameter indicates how many decimals we want our number to be include:
By using the second parameter, we can specify the amount of decimals that the number will include.
To round a number up to the next integer number, you should use the
math.ceil() function from the math module built-in in Python.
In the code snippet above, we import the module
math in order to use the function
ceil() which will round the number
4 as it is the next integer number.
In this case, we can use
math.floor() from the math module.
In this code, we import the
math module to use the function
floor() and round the number
3.78 to the previous integer number which is
Here some common examples where the
round() methods is used:
Finally, rounding numbers in Python is a fundamental operation that provides more options and opportunities when dealing with numbers in programming. Through this article, we analyzed what rounding numbers in Python is, most common methods like rounding up or down, and mentioned some use cases where is pretty common to use round. Using and exercising these skills will improve our code when using the round method in Python.