Jul 8, 2011 · I have a floating point number in JavaScript, like 42.563134634634. I want to display it as a string "42.56", with exactly two decimal places. How do I do that?

If what you are testing comes from user input, it is still a string even if it represents an int or a float. See How can I read inputs as numbers? for converting the input, and Asking the user for …

For printf, the length modifier l is ignored in the case of floating point types because float arguments are always promoted to double. Jerry Coffin's answer has more information.

Mar 5, 2010 · I've read about the difference between double precision and single precision. However, in most cases, float and double seem to be interchangeable, i.e. using one or the …

Oct 19, 2013 · Numpy does not know how to convert a list either to a float or an np.float, hence the error. You have to convert it to a list of lists, i.e. list(arr[:, 1]) then NumPy will look at the …

Also, the number of significant digits can change slightly since it is a binary representation, not a decimal one. Single precision (float) gives you 23 bits of significand, 8 bits of exponent, and 1 …

Jun 9, 2019 · Numpy's dtype documentation only shows "x bits exponent, y bits mantissa" for each float type, but I couldn't translate that to exactly how many digits …

Feb 19, 2012 · Use Float.floatToIntBits() to extract the bit-value of the float as an integer, then use BigInteger.toByteArray() to make a byte[]. This can be reversed using the BigInteger …

You cannot properly round the number itself, because float (and double) aren't decimal floating-point - they are binary floating-point - so rounding to decimal positions is meaningless. You …

I am wondering what the difference is between these two variables in C: float price = 3.00; and float price = 3.00f; What is the use of suffix f in this case?