<MvIF>

In Miva Script we have the following conditional statements

• if expression: use this statement to execute some code only if a specified condition is true
• if...else statement: use this statement to execute some code if the condition is true and another code if the condition is false
• if...else if....else statement: use this statement to select one of many blocks of code to be executed

Attributes

• EXPR :  Required, returns a value interpreted as a conditional expression, typically involving a comparison, string, or logic operator. The expression must return a true for Miva Script to process the code that follows the <MvIF> tag. An <MvIF> tag must have a closing </MvIF> end tag.

Examples

<MvIF EXPR = "{ condition }">
    Execute the code here if this condition is true, otherwise skip it.
</MvIF>

In this example the code executed branches based on the system clocks current hour of the day, where LT means Less Than. See Operators

<MvIF EXPR = "{ s.tm_hour LT 12 }">
    Good Morning.<br>
<MvELSE>
    Good Afternoon.<br>
</MvIF>

Multiple conditions can be used to determine which of several block s of code to execute.

<MvIF EXPR = "{ g.month LE 3 }">
    First Quarter.<br>

<MvELSEIF EXPR="{ g.month LE 6 }">
    Second Quarter.<br>

<MvELSEIF EXPR="{ g.month LE 9 }">
    Third Quarter.<br>

<MvELSE>
    Fourth Quarter.<br>

</MvIF>

Nested Conditionals

You can nest <MvIF> tags--that is, enclose one inside another. You must make sure that each <MvIF> tag has a corresponding </MvIF> end-tag. Indenting nested tags is not required but it makes your code more readable.

<MvIF EXPR="{age GE 17}">
    This person may be eligible to drive a motor vehicle.<br>
    <MvIF EXPR="{age GT 80}">
        This person requires a re-examination.<br>
    </MvIF>
    The license fee is $40.75.<br>
</MvIF>