Name Errors/Dynamic/ArithmeticException

Synopsis An arihmetic error occurred

Syntax data RunTimeException = ArithmeticException(str message);

Function data RunTimeException = ArithmeticException(str message);

Usage import Exception;

Description This error is generated when an illegal arithmetic operation occurs or when a numeric function is called with an out-of-range argument.

Remedies:

• Check the validity of the argument before you call the function or apply the operator.
• Catch the ArithmeticException yourself, see Rascal:TryCatch.

Examples Division by 0 gives an error:

rascal>3/0;
|stdin:///|(2,1,<1,2>,<1,3>): ArithmeticException("/ by zero")

Giving an out-of-range argument to a mathematical function also gives an error:

rascal>import util::Math;
ok
rascal>tan(-550000000000000000000000);
|rascal://util::Math|(9442,248,<503,0>,<517,28>): ArithmeticException("x should be between -(pi/2) and (pi/2)")
	at *** somewhere ***(|rascal://util::Math|(9442,248,<503,0>,<517,28>))
	at tan(|stdin:///|(5,24,<1,5>,<1,29>))

We can also catch the ArithmeticException error. First import the Rascal exceptions (which are also included in Prelude) and IO:

rascal>import Exception;
ok
rascal>import IO;
ok
rascal>try println(3/0); catch ArithmeticException(msg): println("The message is: <msg>");
The message is: / by zero
ok

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