Operators#

In the Miva Template Language, operators play a crucial role in performing logical, comparison, string manipulation, and mathematical operations. Let’s delve into the various groups of operators and explore examples to understand their functionality.

Comparison Operators#

In the Miva Template Language, operators play a crucial role in performing logical, comparison, string manipulation, and mathematical operations.

Logic Operators#

Logic operators enable you to combine conditions to form logical expressions. The primary logic operators are AND, OR, NOT, and ISNULL. These operators facilitate conditional branching and decision-making in your templates. Here’s an example demonstrating the use of logic operators:

<mvt:assign name="g.color" value="''">
<mvt:if expr="ISNULL(g.color)">
    The variable is NULL.
</mvt:if>

Comparison Operators#

Comparison operators allow you to compare values and expressions, determining their equality, inequality, or relative magnitude. In Miva, comparison operators include the following:

Operator	Example	Explanation
`EQ`	`g.Screen EQ 'SFNT'`	If the global Screen variable is equal to `SFNT`, this returns `true`
`NE`	`g.Screen NE 'SFNT'`	If the global Screen variable is NOT equal to `SFNT`, this returns `true`
`GT`	`l.settings:product:price GT 15`	If the product’s price variable is GREATER than 15, this returns `true`
`LT`	`l.settings:product:price LT 15`	If the product’s price variable is LESS than 15, this returns `true`
`GE`	`l.settings:product:price GE 15`	If the product’s price variable is GREATER than or EQUAL to 15, this returns `true`
`LE`	`l.settings:product:price LE 15`	If the product’s price variable is LESS than or EQUAL to 15, this returns `true`

String Operators and Concatenation:#

String operators enable you to manipulate strings, performing tasks like substring matching and case-insensitive comparisons. Key string operators in Miva include IN, CIN, and the concatenation operator $.

Math Operators:#

Math operators facilitate arithmetic operations, allowing you to perform addition, subtraction, multiplication, and division. Common math operators in Miva include +, -, *, and /.