<if expr></if>

Provided by module: RXML 2 tags

This plugin evaluates expressions. The arithmetic operators are "+, - and /". The last main operator is "%"(per cent). The allowed relationship operators are "<. >, ==, <= and >=".

All integers(characters 0 to 9) may be used together with "." to create floating point expressions.

   Hexadecimal expression: (0xff / 5) + 3
 

To be able to evaluate hexadecimal expressions the characters "a to f and A to F" may be used.

   Integer conversion: ((int) 3.14)
   Floating point conversion: ((float) 100 / 7)
 

Conversion between int and float may be done through the operators "(int)" and "(float)". The operators "&"(bitwise and), "|"((pipe)bitwise or), "&&"(logical and) and "||"((double pipe)logical or) may also be used in expressions. To set prioritizations within expressions the characters "( and )" are included. General prioritization rules are:

1. (int), (float)

2. *, /, %

3. +, -

4. <, >, <=, >=

5. ==

6. &, |

7. &&, ||

   Octal expression: 045
 

   Calculator expression: 3.14e10 / 3
 

Expressions containing octal numbers may be used. It is also possible to evaluate calculator expressions.

Expr is an Eval plugin.

Attributes

expr="expression"

Choose what expression to test.