Expressions

expressions

Expressions are important building blocks in an EasyUO script. They can be used to create relatively advanced integer mathematics.

An expression can be a simple constant value or it can be a more advanced mathematical expression.

set %var 2 + 2

User Contributed Notes

/docs/expressions.php

the.WZA@easyuo.com

30-Jun-2005 14:32

This whole chapter need to be clarified in order to distingish Satements from Expressions.

STATEMENTS:

An EasyUO script is a sequence of statements. A statement is any of the following:
- a command
- a block
- a control structure

A command typically takes the form: <command_name> <parameters>

Example:
set %var 2 + 2

A block is a sequence of statements grouped within brackets. Opening and closing brackets MUST occurs on a distinct line (Hence one could argue that both "{" and "}" are statements by themself). Blocks are almost excusively used in conjuntion with control structures.

Example:
{
    set %var 2 + 2
    display ok %var
}

Control structure are defined individually elsewhere in the documentation.


EXPRESSIONS:

An expresion is any of the following:
- a literal
- a variable
- an expresion enclosed with parenthesis
- an unary operator followed by an expression
- an expression followed by a binary operator and an expression

Examples:
1337 ; literal numeric value
cheffe ; literal string value
%var
! #true ; unary operator
%var + 1 ; binary operator
( 2 + 2 ) * ( 3 - 1 ) ; parenthesis enclosed expressions

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