up
previous
next
Defined
Syntax
Defined(E)
where E is a CoCoA expression.
Summary
check if an expression has been defined
Description
This function returns TRUE if E is defined, otherwise it returns
false. Typically, it is used to check if a name has already been
assigned.
example
Defined(MyVariable);
FALSE
-------------------------------
MyVariable := 3;
Defined(MyVariable);
TRUE
-------------------------------