Rounding may be necessary when high accuracy is not required in calculations or when an approximate value is sufficient for acceptable accuracy of the calculation result. Rounding can also significantly simplify calculations.
After all, it is much more convenient to represent the same number π as a modest 3.14, and not as, say, 3.14159265358979323846, if the accuracy of the calculations does not require it. Rounded numbers are much easier to read and perceive. When we see numbers with a large number of digits after the decimal point, it looks cumbersome, confusing and incomprehensible. Especially if there are many such numbers.
And, of course, it should be noted that rounding is also useful in terms of saving time. Obviously, it is faster to work with rounded numbers, since they contain fewer digits.
Next, we will look at the methods of rounding numbers used in the Python programming language.
This is a built-in function in Python. That is, to use it, you cyprus telegram data do not need to import any modules. In general, this function entry looks like this:
round ( number, digits )
The first argument is the number to round, and the second is the number of decimal places to keep during the rounding process. If you don't specify the second argument, its value defaults to zero. When using this function, it's important to note that it works differently in different versions of Python.
So, in the second version of Python, rounding is performed according to the rules of classical arithmetic.
That is, if after the decimal point there are numbers from 1 to 4, then rounding occurs downwards, and if after the decimal point there are numbers from 5 to 9, then rounding occurs upwards. In the third version, rounding occurs according to the so-called "banking" method. This means that rounding occurs to the nearest even number.