Expressions

Expressions have to be written within double curly brackets {{ ... }}.

You can combine and nest as many expression types as you want. Do not nest the curly brackets but only the functions and operators itself. You can open and close multiple expressions in one string.

Expressions can be used in following places:

• In the content of data display items, so for example within the content of a TextBlock
• In the expressions property of rules

Available expressions

Type	Example	Comment
Input value	{{ [myID] }}	Use the id of the input that you want to insert
Add	{{ [x] + 4 }}
Substract	{{ 10 - [x] }}
Multiply	{{ [x] * 5 }}
Divide	{{ [x] / 5 }}
Modulus	{{ [x] % 3 }}
Power	{{ [x] ^ 2 }}
Smaller	{{ [x] < 2 }}	Only for numbers
Smaller or equal	{{ [x] <= 2 }}	Only for numbers
Greater	{{ [x] > 2 }}	Only for numbers
Greater or equal	{{ [x] >= 2 }}	Only for numbers
Equal (numbers)	{{ [x] == 2 }}	Only for numbers
Not equal (numbers)	{{ [x] != 2 }}	Only for numbers
Condition	{{ [x] > 5 ? 10 : 0 }}
Round	{{ round([x] / 7) }}
Round up	{{ ceil([x] / 7) }}
Round down	{{ floor([x] / 7) }}
Square root	{{ sqrt([x]) }}
Minimum	{{ min([x], [y]) }}
Maximum	{{ max([x], [y]) }}
String length	{{ length("[x]") }}	Add quotes (' or ") so that the value is interpreted as string
String concatenation	{{ concat("[x]", "[y]") }}
Substring	{{ "[x]"[1:5] }}` `{{ "[x]"[1] }}	Index starts at 1
Split before	{{ splitBefore("[x]", "-") }}	Returns the substring until the first occurrence of the second parameter
Split after	{{ splitAfter("[x]", "-") }}	Returns the substring after the first occurrence of the second parameter
Split item	{{ splitItem("[x]", "-", 1) }}	Returns the nth (third parameter) substring when splitting the string at every occurrence of the second parameter, starting with 0
Replace	{{ replace("Hello World", " ", ", my ") }}
Includes	{{ includes("Hello World", "World") }}
Equals	{{ equals("[x]", "GPU") }}	Works with every data type
And	{{ [x] == 5 and [y] != 5 }}
Or	{{ [x] == 5 or [y] < 8 }}
Xor	{{ [x] == 5 xor [y] > 8 }}
Not	{{ not [x] == 5 }}
Grouping	{{ ([x] + 5) * 10 }}	Use ` () ` to prioritize certain parts of an expression