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Difference between revisions of "EDT:Writing basic logic"
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Revision as of 21:55, 12 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
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
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