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Difference between revisions of "EDT:Writing basic logic"
Line 17: | Line 17: | ||
If-then-else statement | If-then-else statement | ||
<source lang="java"> | <source lang="java"> | ||
+ | if ( x > 4 ) | ||
+ | x = y; | ||
+ | else | ||
+ | x = 10; | ||
+ | end | ||
+ | </source> | ||
+ | <source lang="php"> | ||
if ( x > 4 ) | if ( x > 4 ) | ||
x = y; | x = y; | ||
Line 52: | Line 59: | ||
</source> | </source> | ||
− | Take one action out of several, | + | Take one action out of several alternatives, depending on the value of an expression |
<source lang="java"> | <source lang="java"> | ||
− | case ( x ) | + | case ( pickles + 57 + LIMIT ) |
+ | when ( 1 ) | ||
+ | y = 1; | ||
+ | when ( 2, 3, 4 ) | ||
+ | y = 2; | ||
+ | when ( "hello", z ) | ||
+ | y = 3; | ||
+ | when ( x ) | ||
+ | y = 4; | ||
+ | otherwise | ||
+ | y = 5; | ||
+ | end | ||
+ | </source> | ||
+ | <source lang="php"> | ||
+ | case ( pickles + 57 + LIMIT ) | ||
when ( 1 ) | when ( 1 ) | ||
y = 1; | y = 1; | ||
when ( 2, 3, 4 ) | when ( 2, 3, 4 ) | ||
y = 2; | y = 2; | ||
− | when ( "hello", z | + | when ( "hello", z ) |
y = 3; | y = 3; | ||
− | when ( | + | when ( x ) |
y = 4; | y = 4; | ||
otherwise | otherwise |
Revision as of 16:35, 10 February 2012
Basic EGL statements
EGL's basic syntax is similar to C, Java, and many other languages.
Assign x to y
y = x;
If-then statement
if ( x > 4 ) x = y; end
If-then-else statement
if ( x > 4 ) x = y; else x = 10; end
if ( x > 4 ) x = y; else x = 10; end
While loop
while ( x > 0 ) counter += 1; x -= 1; end
Call a function
doSomething();
Call a function, passing in parameters, and assign the result to a variable
z = doSomethingElse( 1, x, "hello", true );
Return from a function
return;
Return a value from a function
return ( x );
Take one action out of several alternatives, depending on the value of an expression
case ( pickles + 57 + LIMIT ) when ( 1 ) y = 1; when ( 2, 3, 4 ) y = 2; when ( "hello", z ) y = 3; when ( x ) y = 4; otherwise y = 5; end
case ( pickles + 57 + LIMIT ) when ( 1 ) y = 1; when ( 2, 3, 4 ) y = 2; when ( "hello", z ) y = 3; when ( x ) y = 4; otherwise y = 5; end
Exception handling with the try-onException statement
try addToAccount( 100 ); deductFromAccount( 100 ); onException ( ex AnyException ) SysLib.writeStderr( "Oh noes! " :: ex.message ); end
Handling more than one kind of exception
try addToAccount( 100 ); deductFromAccount( 100 ); onException ( ex1 AddException ) SysLib.writeStderr( ex1.message ); onException ( ex2 DeductException ) SysLib.writeStderr( ex2.message ); onException ( ex3 UserException ) SysLib.writeStderr( ex3.message ); end