Course of Raku / Essentials / Numbers
Floating-point numbers
In the previous section, we saw that numbers such as 1.5 are rational numbers. To make a number that corresponds to a double number in C++, use scientific notation:
1E0
314e-2
-5e-20
5.424E40
7.6e+15
In this case, Raku creates instances of the Num data type and stores the data as an IEEE number internally.
Built-in constants
There are a few constants listed below that you can use straight ahead. They are the numbers of the Num type. Both ASCII and Unicode variants are available:
pi |
π |
3.141592653589793 |
tau |
τ |
equals to 2 * π |
e |
𝑒 |
2.718281828459045 |
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