//Tutorials/hello.rs
//Matthew Ellison
// Created: 06-06-20
//Modified: 06-06-20
//This is a hello world program for rust


fn main(){
	// In general, the `{}` will be automatically replaced with any
	// arguments. These will be stringified.
	println!("{} days", 31);

	// Without a suffix, 31 becomes an i32. You can change what type 31 is
	// by providing a suffix. The number 31i64 for example has the type i64.

	// There are various optional patterns this works with. Positional
	// arguments can be used.
	println!("{0}, this is {1}. {1}, this is {0}", "Alice", "Bob");

	// As can named arguments.
	println!("{subject} {verb} {object}",
			 object="the lazy dog",
			 subject="the quick brown fox",
			 verb="jumps over");

	// Special formatting can be specified after a `:`.
	println!("{} of {:b} people know binary, the other half doesn't", 1, 2);

	// You can right-align text with a specified width. This will output
	// "     1". 5 white spaces and a "1".
	println!("{number:>width$}", number=1, width=6);

	// You can pad numbers with extra zeroes. This will output "000001".
	println!("{number:>0width$}", number=1, width=6);

	// Rust even checks to make sure the correct number of arguments are
	// used.
	println!("My name is {0}, {1} {0}", "Bond", "James");

	// Create a structure named `Structure` which contains an `i32`.
	#[allow(dead_code)]
	struct Structure(i32);

	// However, custom types such as this structure require more complicated
	// handling. This will not work.
	//println!("This struct `{}` won't print...", Structure(3));
	// FIXME ^ Comment out this line.

	//This prints out PI to 3 digits past the decimal
	println!("PI is roughly {PI:.3}", PI=3.14159);
}