Help:ParserFunctions: Difference between revisions

Revision as of 18:07, 17 April 2006

Revision as of 20:49, 17 April 2006

Line 10:

The <tt>expr</tt> function computes mathematical expressions. The supported operators (roughly in order of precedence) are:

{|

! Operator

; * : Multiplication

! Operation

; / <span style="font-weight: normal">or</span> div: Division

! Example

; + : Addition

|-

; - : Subtraction (or negation)

! *

; mod : Modulo, gives the remainder of a division

; * :|| Multiplication

:*<nowiki>{{#expr: 30 mod 7}}</nowiki> = {{#expr: 30 mod 7}}

||<nowiki>{{#expr: 30 * 7}}</nowiki> = {{#expr: 30 * 7}}

; round : Rounds off the number on the left to the specified number of digits after the decimal place, given on the right

|-

; = : Equality

;! <>/ <span style="font-weight: normal">or</span> != : Inequalitydiv

|| Division

; < : Less than

||<nowiki>{{#expr: 30 / 7}}</nowiki> = {{#expr: 30 / 7}}

; > : Greater than

|-

; <= : Less than or equal to

! +

; >= : Greater than or equal to

; + :|| Addition

; and : Logical AND

||<nowiki>{{#expr: 30 + 7}}</nowiki> = {{#expr: 30 + 7}}

; or : Logical OR

|-

; not : Logical NOT

! -

; ( ) : Grouping operators

; - :|| Subtraction (or negation)

||<nowiki>{{#expr: 30 - 7}}</nowiki> = {{#expr: 30 - 7}}

|-

! mod

; mod :|| Modulo, gives the remainder of a division

:*||<nowiki>{{#expr: 30 mod 7}}</nowiki> = {{#expr: 30 mod 7}}

|-

! round

; round :|| Rounds off the number on the left to the specified number of digits after the decimal place, given on the right

||<nowiki>{{#expr: 30 / 7 round 7}}</nowiki> = {{#expr: 30 / 7 round 7}}

|-

! =

; = :|| Equality

||<nowiki>{{#expr: 30 = 7}}</nowiki> = {{#expr: 30 = 7}}

|-

;! /<> <span style="font-weight: normal">or</span> div: Division!=

|| Inequality

||<nowiki>{{#expr: 30 <> 7}}</nowiki> = {{#expr: 30 <> 7}}

|-

! <

; < :|| Less than

||<nowiki>{{#expr: 30 < 7}}</nowiki> = {{#expr: 30 < 7}}

|-

! >

; > :|| Greater than

||<nowiki>{{#expr: 30 > 7}}</nowiki> = {{#expr: 30 > 7}}

|-

! <=

; <= :|| Less than or equal to

||<nowiki>{{#expr: 30 <= 7}}</nowiki> = {{#expr: 30 <= 7}}

|-

! >=

; >= :|| Greater than or equal to

||<nowiki>{{#expr: 30 >= 7}}</nowiki> = {{#expr: 30 >= 7}}

|-

! and

; and :|| Logical AND

||<nowiki>{{#expr: 30 and 7}}</nowiki> = {{#expr: 30 and 7}}

|-

! or

; or :|| Logical OR

||<nowiki>{{#expr: 30 or 7}}</nowiki> = {{#expr: 30 or 7}}

|-

! not

; not :|| Logical NOT

||<nowiki>{{#expr: not 7}}</nowiki> = {{#expr: not 7}}

|-

! ( )

; ( ) :|| Grouping operators

||<nowiki>{{#expr: (30 + 7) * 7 }}</nowiki> = {{#expr: (30 + 7) * 7 }}

|}

The boolean operators consider 0 to be false and 1 to be true.