Added chapter 7

src/Expressions.rs

@@ -0,0 +1,31 @@
+pub fn main(){
+	/*
+	//variable binding
+	let x = 5;
+
+	//expression;
+	x;
+	x + 1;
+	15;
+	*/
+
+	let x = 5u32;
+
+	let y = {
+		let x_squared = x * x;
+		let x_cube = x_squared * x;
+
+		//This expression will be assigned to `y`
+		x_cube + x_squared + x
+	};
+
+	#[allow(unused_must_use)]
+	let z = {
+		//The semicolon suppresses this expression and `()` is assigned to `z`
+		2 * x;
+	};
+
+	println!("x is {:?}", x);
+	println!("y is {:?}", y);
+	println!("z is {:?}", z);
+}

src/main.rs

@@ -7,6 +7,7 @@ mod CustomTypes;
 mod VariableBindings;
 mod Types;
 mod Conversion;
+mod Expressions;
 
 
 fn main(){
@@ -69,9 +70,12 @@ fn main(){
 
 	//6 Conversion
 	//6.1 From and Into
-	Conversion::FromAndInto::main();
+	//Conversion::FromAndInto::main();
 	//6.2 TryFrom and TryInto
-	Conversion::TryFromAndTryInto::main();
+	//Conversion::TryFromAndTryInto::main();
 	//6.3 To and From Strings
-	Conversion::ToAndFromStrings::main();
+	//Conversion::ToAndFromStrings::main();
+
+	//7 Expressions
+	Expressions::main();
 }