6 Answered Questions for the topic floating point

Floating Point C Ios Objective C


How dangerous is it to compare floating point values?

I know `UIKit` uses `CGFloat` because of the resolution independent coordinate system.But every time I want to check if for example `frame.origin.x` is `0` it makes me feel sick: if... more
Floating Point Python Casting Type Conversion


How do I check if a string is a number (float)?

What is the best possible way to check if a string can be represented as a number in Python? The function I currently have right now is: def is_number(s): try: float(s) ... more


Is floating point math broken?

Consider the following code:<!-- language: lang-js --> 0.1 + 0.2 == 0.3 -> false<!-- language: lang-js --> 0.1 + 0.2 -> 0.30000000000000004 Why do these... more
Floating Point Python Integer Parsing


How do I parse a string to a float or int in Python?

In Python, how can I parse a numeric string like `"545.2222"` to its corresponding float value, `545.2222`? Or parse the string `"31"` to an integer, `31`?I just want to know how to parse a *float*... more
Floating Point Math Division Ruby


Why is division in Ruby returning an integer instead of decimal value?

For example: 9 / 5 #=> 1but I expected `1.8`. How can I get the correct decimal (non-integer) result? Why is it returning `1` at all?
Floating Point C++ C Logic


What happens when you logical not a float?

I assume this just returns an int. Is there anything else going on I should be aware of? C/C++ differences? float a = 2.5; !a; // What does this return? Int? Float?

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