Expressions can be used to create advence structures and applications. It allowes to use mathematic/logic syntax and 3 build in functions (abs, min, max). Expression can be maximum 256 character length.

[[#if value | display if true | display if false ]]
Simple true/false checker, it treats first parameter as string and evaluate it to true/false
false is a:

• string false
• string null
• empty string
• 0

everything else is true

[[#ifexpr expression | display if true | display if false ]]
This syntax evaluates expression and check if it's true or not.

[[#expr expression]]
It evaluates expression and display it.

Examples:

[[#expr abs(-100) ]]
[[#expr min(4, 1, -4, 6, -10) ]]
[[#expr max(4, 1, -4, 6, -10) ]]
[[#expr 2*4/12-4+66%2 ]]
[[#ifexpr 2*4/12-4+66%2 < -3.5 | less than -3.5 | greater than -3.5 ]]
[[#expr 2*(2-1) ]]
[[#if true | display if true | display if false ]]

100
-10
6
-3.33333333333
greater than -3.5
2
display if true