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Difference between revisions of "EDT:Writing basic logic"
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Assign x to y | Assign x to y | ||
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y = x; | y = x; | ||
</source> | </source> | ||
If-then statement | If-then statement | ||
| − | <source lang=" | + | <source lang="pascal"> |
if ( x > 4 ) | if ( x > 4 ) | ||
x = y; | x = y; | ||
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If-then-else statement | If-then-else statement | ||
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<source lang="pascal"> | <source lang="pascal"> | ||
if ( x > 4 ) | if ( x > 4 ) | ||
| Line 32: | Line 25: | ||
While loop | While loop | ||
| − | <source lang=" | + | <source lang="pascal"> |
while ( x > 0 ) | while ( x > 0 ) | ||
counter += 1; | counter += 1; | ||
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Call a function | Call a function | ||
| − | <source lang=" | + | <source lang="pascal"> |
doSomething(); | doSomething(); | ||
</source> | </source> | ||
Call a function, passing in parameters, and assign the result to a variable | Call a function, passing in parameters, and assign the result to a variable | ||
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z = doSomethingElse( 1, x, "hello", true ); | z = doSomethingElse( 1, x, "hello", true ); | ||
</source> | </source> | ||
Return from a function | Return from a function | ||
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return; | return; | ||
</source> | </source> | ||
Return a value from a function | Return a value from a function | ||
| − | <source lang=" | + | <source lang="pascal"> |
return ( x ); | return ( x ); | ||
</source> | </source> | ||
Take one action out of several alternatives, depending on the value of an expression | Take one action out of several alternatives, depending on the value of an expression | ||
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<source lang="pascal"> | <source lang="pascal"> | ||
case ( pickles + 57 + LIMIT ) | case ( pickles + 57 + LIMIT ) | ||
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Exception handling with the try-onException statement | Exception handling with the try-onException statement | ||
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try | try | ||
addToAccount( 100 ); | addToAccount( 100 ); | ||
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Handling more than one kind of exception | Handling more than one kind of exception | ||
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try | try | ||
addToAccount( 100 ); | addToAccount( 100 ); | ||
Revision as of 16:38, 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
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