Dyadic operators

Formulae in ITP are calculated from left to right in case of operators with equal priority (left associative).

The ITP Model language knows the following dyadic operators:

Operator	Associativity	Operand types	Result type	Operation performed
+	Left	NUMBER	NUMBER	Addition
+	Left	TEXT	TEXT	Concatenation of operand texts
-	Left	NUMBER	NUMBER	Subtraction
*	Left	NUMBER	NUMBER	Multiplication
/	Left	NUMBER	NUMBER	Division
%	Left	NUMBER	NUMBER	Percentage
<	Left	NUMBER; TEXT	BOOL	Less than
>	Left	NUMBER; TEXT (*)	BOOL	Greater than
<=	Left	NUMBER; TEXT (*)	BOOL	Less than or equal
>=	Left	NUMBER; TEXT (*)	BOOL	Greater than or equal
=	Left	Left and right the same type; NUMBER or BOOL	BOOL	Equal to
<>	Left	Left and right the same type: NUMBER or BOOL	BOOL	Not equal to
AND	Left	BOOL	BOOL	Left AND right operand must be TRUE for the result to be TRUE.
OR	Left	BOOL	BOOL	Left OR right or both operands must be TRUE for the result to be TRUE

(*) Note

Comparing 2 text values with dyadic operators could fail if you try to compare 2 text values that use a different encoding system. It is better to use the function compare_characters in these cases to avoid problems.

Priorities

The operators have the following priorities ( where 1 is the highest priority and 7 the lowest):

Monadic operators
%, * and /
+ and -
<=, <, >= and >
= and <>
AND
OR

Note

Monadic operators have a higher priority than dyadic operators. So: -2+5 = 3.