Much as with other languages, floating point arithmetic can be performed in Rust. As with an integer variable, a floating point variable is defined for a 32-bit float as follows:
let pi = 3.14f32;
For a 64-bit float, it will be defined as this:
let pi = 3.14f64;
The variables are literal values. Another way to declare the size would be via types:
let pi: f32 = 3.14;
If a type is omitted (for example, let x = 3.14), the variable will be declared as a 64-bit floating point variable.