Rust - Variables

Variables

To declare a variable we can simply use as below:

let var  = 2;

to define the variable type

let var:i32  = 2;

the variable var will be defined as i32 type.

for multiple variables

let (var1, var2) = (8,30); -- tple patrens

Variable are immutables by default unless we specify as a table like,

the above variable var can not be changed by default.

let mut var  = 2;

with default immutables Safety,  Concurrency, and Speed will be increased with optimization.

const PI_VALUE: f64 = 3.14;