Difference between revisions of "User:Berni44/Floatingpoint"
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== An introduction to floating point numbers == | == An introduction to floating point numbers == | ||
| + | |||
| + | You probably already know, that strange things can happen, when using floating point numbers. | ||
| + | |||
| + | An example: | ||
| + | |||
| + | <syntaxhighlight lang=D> | ||
| + | import std.stdio; | ||
| + | |||
| + | void main() | ||
| + | { | ||
| + | float a = 1000; | ||
| + | float b = 1/a; | ||
| + | float c = 1/b; | ||
| + | writeln("Is ",a," == ",c,"? ",a==c?"Yes!":"No!"); | ||
| + | } | ||
| + | </syntaxhighlight> | ||
| + | |||
| + | Did you guess the answer? | ||
| + | |||
| + | <pre>Is 1000 == 1000? No!</pre> | ||
| + | |||
| + | == Nano floats == | ||
| + | |||
| + | To understand this strange behavior we have to look at the bit representation of the numbers involved. | ||
... to be continued | ... to be continued | ||
Revision as of 18:38, 13 February 2021
An introduction to floating point numbers
You probably already know, that strange things can happen, when using floating point numbers.
An example:
import std.stdio;
void main()
{
float a = 1000;
float b = 1/a;
float c = 1/b;
writeln("Is ",a," == ",c,"? ",a==c?"Yes!":"No!");
}
Did you guess the answer?
Is 1000 == 1000? No!
Nano floats
To understand this strange behavior we have to look at the bit representation of the numbers involved.
... to be continued
