Difference between revisions of "Expressions"
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====Expressions==== | ====Expressions==== | ||
Expressions are important building blocks in an EasyUO script. They can be used to create relatively advanced integer mathematics. | Expressions are important building blocks in an EasyUO script. They can be used to create relatively advanced integer mathematics. | ||
| − | An expression | + | An expression is any of the following: |
| − | + | * a literal | |
| − | + | * a variable | |
| + | * an expression enclosed with parenthesis | ||
| + | * an unary operator followed by an expression | ||
| + | * an expression followed by a binary operator and an expression | ||
| − | |||
| − | + | <pre> | |
| − | + | set %var 1337 ; literal numeric value | |
| − | + | set %name cheffe ; literal string value | |
| − | + | set %temp %var | |
| − | + | set %faux ! #true ; unary operator | |
| − | + | set %var %var + 1 ; binary operator | |
| + | set %calculus ( 2 + 2 ) * ( 3 - 1 ) ; parenthesis enclosed expressions</pre> | ||
===Statements=== | ===Statements=== | ||
| − | |||
An EasyUO script is a sequence of statements. A statement is any of the following: | 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> | A command typically takes the form: <command_name> <parameters> | ||
Example: | Example: | ||
| − | set %var 2 + 2 | + | <pre>set %var 2 + 2</pre> |
| − | A block is a sequence of statements grouped within brackets. Opening and closing brackets | + | 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 themselves). Blocks are almost exclusively used in conjunction with control structures. |
| − | + | <pre>{ | |
| − | { | + | |
set %var 2 + 2 | set %var 2 + 2 | ||
display ok %var | display ok %var | ||
| − | } | + | }</pre> |
Control structure are defined individually elsewhere in the documentation. | Control structure are defined individually elsewhere in the documentation. | ||
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Latest revision as of 12:50, 17 July 2007
Contents
Expressions
Expressions are important building blocks in an EasyUO script. They can be used to create relatively advanced integer mathematics.
An expression is any of the following:
- a literal
- a variable
- an expression enclosed with parenthesis
- an unary operator followed by an expression
- an expression followed by a binary operator and an expression
set %var 1337 ; literal numeric value set %name cheffe ; literal string value set %temp %var set %faux ! #true ; unary operator set %var %var + 1 ; binary operator set %calculus ( 2 + 2 ) * ( 3 - 1 ) ; parenthesis enclosed 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 themselves). Blocks are almost exclusively used in conjunction with control structures.
{
set %var 2 + 2
display ok %var
}
Control structure are defined individually elsewhere in the documentation.
| Main_Page | Documentation |
