if: Difference between revisions

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==Function if==
==Function if==
If testCondition evaluates to 0 then the result of falseExpr is returned, otherwise the result of trueExpr is returned. Note: '''both''' trueExpr and falseExpr are evaluated no matter what the result of testCondition is. You may want to consider using [[Macros:Roll:if | [if():]]] instead.
If testCondition evaluates to 0 then the result of falseExpr is returned, otherwise the result of trueExpr is returned. Note: '''both''' trueExpr and falseExpr are evaluated no matter what the result of testCondition is. You may want to consider using [[Macros:Roll:if | [if():]]] instead.
Test condition notation:
> for great than
< for less than
>= for greater than or equal to
<= for less than or equal to
== for equal to (yes, you must use TWO equal signs when setting the condtion
If you are checking for a text string, place quotes around the text.


===Usage===
===Usage===
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<source lang="mtmacro" line>
<source lang="mtmacro" line>
[r: if(a>b, "A is larger than B", "A is not larger than B")]
[r: if(a>b, "A is larger than B", "A is not larger than B")]
[someProperty = if(variable==1,20,"")]
[someProperty = if(variable>=1,20,"")]
</source>Sets someProperty to 20 if variable is equal to 1, or makes it blank (but not empty) otherwise.
</source>Sets someProperty to 20 if variable is greater than or equal to 1, or makes it blank (but not empty) otherwise.
<source lang="mtmacro" line>
[someProperty = if(variable=="Text",1,0)]</source>Sets someProperty to 1 if variable contains the text string Text, 0 otherwise.

Revision as of 22:42, 13 January 2009

Function if

If testCondition evaluates to 0 then the result of falseExpr is returned, otherwise the result of trueExpr is returned. Note: both trueExpr and falseExpr are evaluated no matter what the result of testCondition is. You may want to consider using [if():] instead.

Test condition notation: > for great than < for less than >= for greater than or equal to <= for less than or equal to == for equal to (yes, you must use TWO equal signs when setting the condtion If you are checking for a text string, place quotes around the text.

Usage

[h: result = if(testCondition, trueExpr, falseCondition)]


Examples

[r: if(a>b, "A is larger than B", "A is not larger than B")]
[someProperty = if(variable>=1,20,"")]

Sets someProperty to 20 if variable is greater than or equal to 1, or makes it blank (but not empty) otherwise.

[someProperty = if(variable=="Text",1,0)]

Sets someProperty to 1 if variable contains the text string Text, 0 otherwise.