Rust Tutorial : Tuples
from tutorialspoint.com

Definition
tuple is a compound data type
a scalar type can store only one type of data
compound types can store more than one value at a time
can be of different types
have a fixed length, cannot grow or shrink in size
zero-based index

Syntax
two ways to create a tuple 
let tuple_name:(data_type1,data_type2,data_type3) = (value1,value2,value3);

let tuple_name = (value1,value2,value3);
example 
fn main() {
   let tuple:(i32,f64,u8) = (-325,4.9,22);
   println!("{:?}",tuple);
}
output 
(-325, 4.9, 22)
the println!("{ }",tuple) syntax cannot be used to display values in a tuple
use the println!("{:?}", tuple_name) syntax to print values in a tuple
example prints individual values in a tuple 
fn main() {
   let tuple:(i32,f64,u8) = (-325,4.9,22);
   println!("integer is :{:?}",tuple.0);
   println!("float is :{:?}",tuple.1);
   println!("unsigned integer is :{:?}",tuple.2);
}
output 
integer is :-325
float is :4.9
unsigned integer is :2
example passes a tuple as parameter to a function
tuples are passed by value to functions 
fn main(){
   let b:(i32,bool,f64) = (110,true,10.9);
   print(b);
}
//pass the tuple as a parameter
fn print(x:(i32,bool,f64)){
   println!("Inside print method");
   println!("{:?}",x);
}
Destructing
destructing assignment is a feature of rust to unpack the values of a tuple
achieved by assigning a tuple to distinct variables 
fn main(){
   let b:(i32,bool,f64) = (30,true,7.9);
   print(b);
}
fn print(x:(i32,bool,f64)){
   println!("Inside print method");
   let (age,is_male,cgpa) = x; //assigns a tuple to distinct variables
   println!("Age is {} , isMale? {},cgpa is 
   {}",age,is_male,cgpa);
}
variable x is a tuple which is assigned to the let statement
each variable - age, is_male and cgpa will contain the corresponding values in a tuple output 
Inside print method
Age is 30 , isMale? true,cgpa is 7.9
index