Statements and expressions

Mafiascript has statements and expressions. This page explains the differences between the two.

• Statements
  • If
  • Loop
  • Declaration
  • Assignment
  • Return
• Expressions

Statements

Statements are a piece of code that do not return anything and control the flow of the program.

If

if (expression) {
  //body
} else if (exp) {} else if (exp) {} else {};

if (expression) expression
else expression;

Loop

loop (before, check, after) {
   //body
}

Where before can be:

• A declaration statement
• Any expression

Where check can be:

• Any expression

Where after can be:

• Any expression

before and after are optional. A loop can also have just a check:

loop (check) { ... };
loop (check, after) { ... };
loop (before, check, after) { ... };

Declaration

const something = expression;
let somethingElse = expression;

Assignment

somethingElse = expression;
somethingElse += expression;
somethingElse -= expression;
somethingElse *= expression;
somethingElse /= expression;

Return

return expression;
return;

Expressions

Everything else that's not a statement is an expression. This includes:

• Primitive values (string, number, boolean, null)
• Array and object literals

const arr = [1, 2, 3];
const obj = {
  "a": expression
};

• Functions

const func = (param) => {
   //body
}

• Binary operations (+, -, *, /)
• Unary operations (!, ++, --)
• And / Or (&&, ||)
• Function calls

func(15);

• Property accessors

arr[0];
obj.a;
obj["a"].toString();

• Typeof keyword

typeof obj.a;

• Ternery

expression ? ifTrue:ifFalse;