WealthScript: basic syntax

67

By thetrader

Semicolons at the end of each statement

Each WealthScript statement must end with the semicolon character (;). The semicolon lets WealthScript know that one statement is completed and another one is beginning.

Comments

Single Line Comments

Use the "//" characters to create single line comments.

Example

//This is truly the Holy Grail of Trading Systems!

Comment Blocks

Use the curly braces to create a comment block.

Example

{ This is a comment block

this text will not be executed

by the script }

data types

integer

Stores whole number values. Values can range from -2,147,483,648 to 2,147,483,647. You can perform mathematical Operations on integer variables.

float

Stores floating point values. Values can range from 1.5 x 10^-45 to 3.4 x 10^38, and will maintain 7 to 8 significant digits. You can perform mathematical Operations on float variables.

string

Can store textual data of any length. You can perform string Operations on string variables.

boolean

Can contain one of two logical values: true or false. You can perform logical Operations on boolean variables.

var statement to declare a variable

You can declare multiple variables of the same data type with a single var statement.

Example

var MyVariable: integer;

var Var1, Var2: integer;

var Var1: integer; var Var2: float;

var Name, Rank, Serial_Number: string;

var YesNo: boolean;

assignment operator (:=)

Example

var n: integer;

n := 100;

var s: string;

s := 'My name is Smith';

var f: float;

f := 3.1415;

var b: boolean;

b := true;

For Loop

Example

var n: integer;

var x: float;

x := 2;

{ Repeat a single statement 10 times }

for n := 1 to 10 do

x := x * 2;

{ Repeat a group of statements 10 times }

for n := 1 to 10 do

begin

x := x * 2;

x := x + 5;

end;

{ Use the index variable in the loop }

for n := 1 to 10 do

begin

x := x + n * 2;

x := x / n;

end;

If/Then/Else Statements

You must use a begin/end statement pair to create a "code block" that encloses the statements.

Example 1

var x: integer;

x := 10;

{ This if/then will execute 3 statements }

if x * 2 = 20 then

begin

x := x * 2;

x := x - 1;

x := x / 10;

end;

Example 2 

{ if/then/else with begin/end blocks, with code in the blocks }

var x: integer;

x := 10;

if x < 10 then

begin

x := x * 2 + 1;

x := x / 5;

end

else

begin

x := x * x;

x := x / 2;

end;

Case Statement

Example 

var n: integer;

n := Round( Random * 5 ) + 1;

case n of

1:

ShowMessage( 'One' );

2:

ShowMessage( 'Two' );

3:

ShowMessage( 'Three' );

4:

ShowMessage( 'Four' );

else

ShowMessage( 'None of the Above' );
 end;

Example 

var n: integer;

n := Round( Random * 10 ) + 1;

case n of

1, 2:

begin

ShowMessage( 'One, Two' );

ShowMessage( 'Buckle my Shoe' );

end;

3, 4:

begin

ShowMessage( 'Three, Four' );

ShowMessage( 'Trade Some More' );

end;

else

ShowMessage( 'Collect your Profits now!' );

end;

While / Repeat Loop

While Example

var n1, n2: integer;

n1 := 10;

n2 := 50;

while ( n1 < n2 ) do

n1 := n1 + 3;

Repeat Example

var n1, n2: integer;

n1 := 10;

n2 := 50;

repeat

n1 := n1 + 3;

until ( n1 > n2 );

working