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🧮 Variables

Calculate a math expression into a variable in RunMacro

What it does

The Calculate command evaluates a math expression (add, subtract, multiply, divide, floor-divide, modulo, exponent) and stores the result in a variable. Reference numeric variables in the expression with [var_name].

When to use it

Increment/decrement a counter in a loop.
Compute a sum, difference, or derived value.
Process numbers before filling a form.

Configuration steps

Add a Variables › Calculate command.
Set the result variable.
Enter the expression, using [var_name] for numeric variables (e.g. [count] + 1).
Save.

Every option explained

Result variable

The variable that stores the computed result.

Expression

The arithmetic expression. Reference numeric variables via [var_name]; supports + - * /, floor-division //, modulo %, exponent **, and parentheses ( ).

Real example

Example: increment a counter each loop

Declare Variable count = 0.
In the loop: Calculate count = [count] + 1.
Use {count} to show the run count.

Tips & common mistakes

In expressions, reference variables with [name] (square brackets), unlike {name} used in text fields.