If you run the code, you’ll get this error: converted_my_num = str(my_num, encoding='utf-8', errors='errors')
Convert float to string python how to#
You have to comma-separate each of the parameters in the str() function, and the values of both encoding and errors have to be in strings: str(object_to_convert, encoding='encoding', errors='errors')įirst, let’s see how to use all the parameters of the str() function: my_num = 45Ĭonverted_my_num = str(my_num, encoding='utf-8', errors='errors') The values you can use for this parameter include strict, ignore, replace, and others. errors: specifies what to do if decoding fails.encoding: the encoding of the data to convert.If you don’t provide it, str() returns an empty string as the result. object: the data you want to convert to a string.This object the str() function takes can be a float, integer, or even a Boolean.Īpart from the compulsory data to convert to a string, the str() function also takes two other parameters. The str() function takes a compulsory non-string object and converts it to a string. It’s a built-in function you can use to convert any non-string object to a string. One of those functions we’ll look at in this article is str(). The programming language provides several functions you can use to convert any of these data types to the other.
The form J/2** N where J is an integer containing exactly 53 bits.Python’s primitive data types include float, integer, Boolean, and string. On input the computer strives to convert 0.1 to the closest fraction it can of IEEE 754 binary64 values contain 53 bits of precision, so Least 2000, almost all machines use IEEE 754 binary floating-point arithmetic,Īnd almost all platforms map Python floats to IEEE 754 binary64 “double Why is that? 1/10 is not exactly representable as a binary fraction. total += x # Multiple roundings in standard precision. > arr = > float ( sum ( map ( Fraction, arr ))) # Exact summation with single rounding 8.042173697819788e-13 > math. Theįloat.as_integer_ratio() method expresses the value of a float as a Python provides tools that may help on those rare occasions when you reallyĭo want to know the exact value of a float. Statistical operations supplied by the SciPy project. If you are a heavy user of floating-point operations you should take a lookĪt the NumPy package and many other packages for mathematical and Also seeįor a more complete account of other common surprises. Problems commonly encountered in practice. See Examples of Floating Point Problems forĪ pleasant summary of how binary floating-point works and the kinds of With “0.1” is explained in precise detail below, in the “Representation Error” pi, ndigits = 2 ) = round ( 22 / 7, ndigits = 2 ) Trueīinary floating-point arithmetic holds many surprises like this.
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