Course of Raku / Essentials / Variables and data types 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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